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Mcq's Programs Code Challenge Assesments
1) Main Dump 2) Second attempt Dumps 3) Java set Dump
1
. Check Sum of Odd Digits  
Write a program to read a number , calculate the sum of odd digits (values) present in the  
given number.  
Include a class UserMainCode with a static method checkSum which accepts a positive  
integer . The return type should be 1 if the sum is odd . In case the sum is even return -1 as  
output.  
Create a class Main which would get the input as a positive integer and call the static  
method checkSum present in the UserMainCode.  
Input and Output Format:  
Input consists of a positive integer n.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
6895  
Sample Output 1:  
Sum of odd digits is odd.  
Sample Input 2:  
8
4228  
Sample Output 2:  
Sum of odd digits is even.  
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
int r=UserMainCode.checkSum(n);  
if(r==1)  
{
System.out.println("The sum of odd digits are odd");  
}
else  
{
System.out.println("The sum of odd digits are even");  
}
s.close();  
}
}
USERMAINCODE:  
public class UserMainCode {  
public static int checkSum(int n)  
{
int n1;  
int sum=0;  
int r;  
while(n!=0)  
{
n1=n%10;  
if(n1%2!=0)  
{
sum=sum+n1;  
}
n=n/10;  
}
if(sum%2==0)  
{
r=-1;  
}
else  
{
r=1;  
}
return r;  
}
}
2
. Number Validation  
Write a program to read a string of 10 digit number , check whether the string contains a 10  
digit number in the format XXX-XXX-XXXX where 'X' is a digit.  
Include a class UserMainCode with a static method validateNumber which accepts a  
string  
as input .  
The return type of the output should be 1 if the string meets the above specified format . In  
case the number does not meet the specified format then return -1 as output.  
Create a class Main which would get the input as a String of numbers and call the static  
methodvalidateNumber present in the UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output is a string specifying the given string is valid or not .  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
23-456-7895  
Sample Output 1:  
Valid number format  
Sample Input 2:  
-
123-12344322  
Sample Output 2:  
Invalid number format  
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String number=s.next();  
int r=UserMainCode.validateNumber(number);  
if(r==1)  
{
System.out.println("Valid number format“);  
}
else  
{
System.out.println("Invalid number format");  
}
s.close();  
}
}
USERMAINCODE:  
import java.util.*;  
public class UserMainCode {  
public static int validateNumber(String number)  
{
int b;  
if(number.matches("[0-9]{3}[-]{1}[0-9]{3}[-]{1}[0-9]{4}"))  
{
b=1;  
}
else  
{
b=0;  
}
return b;  
}
}
3
. Sum of Squares of Even Digits  
Write a program to read a number , calculate the sum of squares of even digits (values)  
present in the given number.  
Include a class UserMainCode with a static method sumOfSquaresOfEvenDigits  
which  
accepts a positive integer . The return type (integer) should be the sum of squares of the  
even digits.  
Create a class Main which would get the input as a positive integer and call the static  
method sumOfSquaresOfEvenDigits present in the UserMainCode.  
Input and Output Format:  
Input consists of a positive integer n.  
Output is a single integer .  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
6895  
Sample Output 1:  
00  
1
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
System.out.println(UserMainCode.sumOfSquaresOfEvenDigits(n));  
s.close();  
}
}
USERMAINCODE:  
public class UserMainCode {  
public static int sumOfSquaresOfEvenDigits(int n)  
{
int n1=0;  
int sum=0;  
while(n!=0)  
{
n1=n%10;  
if(n1%2==0)  
{
sum+=n1*n1;  
}
n=n/10;  
}
return sum;  
}
}
4
. Fetching Middle Characters from String  
Write a program to read a string of even length and to fetch two middle most characters  
from the input string and return it as string output.  
Include a class UserMainCode with a static method getMiddleChars which accepts a  
string  
of even length as input . The return type is a string which should be the middle characters of  
the string.  
Create a class Main which would get the input as a string and call the static  
method getMiddleCharspresent in the UserMainCode.  
Input and Output Format:  
Input consists of a string of even length.  
Output is a string .  
Refer sample output for formatting specifications.  
Sample Input 1:  
this  
Sample Output 1:  
hi  
Sample Input 1:  
Hell  
Sample Output 1:  
el  
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String str=s.nextLine();  
System.out.println(UserMainCode.getMiddleChars(str));  
s.close();  
}
}
USERMAINCODE:  
import java.util.*;  
public class UserMainCode {  
public static String getMiddleChars(String str)  
{
StringBuffer sb=new StringBuffer();  
if(str.length()%2==0)  
{
sb.append(str.substring((str.length()/2)-1,(str.length()/2)+1));  
}
return sb.toString();  
}
}
5
. Check Characters in a String  
Write a program to read a string and to test whether first and last character are same. The  
string is said to be be valid if the 1st and last character are the same. Else the string is said to  
be invalid.  
Include a class UserMainCode with a static method checkCharacters which accepts a  
string  
as input .  
The return type of this method is an int. Output should be 1 if the first character and last  
character are same . If they are different then return -1 as output.  
Create a class Main which would get the input as a string and call the static  
method checkCharacterspresent in the UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output is a string saying characters are same or not .  
Refer sample output for formatting specifications.  
Sample Input 1:  
the picture was great  
Sample Output 1:  
Valid  
Sample Input 1:  
this  
Sample Output 1:  
Invalid  
MAIN:  
import java.util.*;  
public class main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String input=s.nextLine();  
int r=UserMainCode.checkCharacters(input);  
if(r==1)  
{
System.out.println("Valid");  
}
else  
{
System.out.println("Invalid");  
}
s.close();  
}
}
USERMAINCODE:  
import java.util.*;  
public class UserMainCode {  
public static int checkCharacters(String input)  
{
int r;  
StringTokenizer t = new StringTokenizer(input," ");  
String s = t.nextToken();  
String s1 =s ;  
while(t.hasMoreTokens())  
{
s1 = t.nextToken();  
}
if(s.charAt(0) == s1.charAt(s1.length()-1))  
r=1;  
else  
r=0;  
return r;  
}
}
6
. Forming New Word from a String  
Write a program to read a string and a positive integer n as input and construct a string with  
first n and last n characters in the given string.  
Include a class UserMainCode with a static method formNewWord which accepts a  
string  
and positive integer .  
The return type of the output should be a string (value) of first n character and last n  
character.  
Create a class Main which would get the input as a string and integer n and call the static  
methodformNewWord present in the UserMainCode.  
Input and Output Format:  
Input consists of a string of even length.  
Output is a string .  
Note: The given string length must be >=2n.  
Refer sample output for formatting specifications.  
Sample Input 1:  
California  
3
Sample Output 1:  
Calnia  
Sample Input 2:  
this  
1
Sample Output 2:  
Ts  
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
int n1=s.nextInt();  
System.out.println(UserMainCode.formNewWord(s1,n1));  
s.close();  
}
}
USERMAINCODE:  
import java.util.*;  
public class UserMainCode {  
public static String formNewWord(String s1,int n)  
{
String s = new String();  
if(s1.length()>n)  
{
s = s1.substring(0,n) + s1.substring(s1.length()-n, s1.length());  
return s;  
}
else  
return null;  
}
}
7
. Reversing a Number  
Write a program to read a positive number as input and to get the reverse of the given  
number and return it as output.  
Include a class UserMainCode with a static method reverseNumber which accepts a  
positive  
integer .  
The return type is an integer value which is the reverse of the given number.  
Create a Main class which gets the input as a integer and call the static  
method reverseNumber present in the UserMainCode  
Input and Output Format:  
Input consists of a positive integer.  
Output is an integer .  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
43  
Sample Output 1:  
45  
Sample Input 1:  
111  
Sample Output 1:  
111  
3
1
1
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
System.out.println(UserMainCode.reverseNumber(n));  
s.close();  
}
}
USERMAINCODE:  
public class UserMainCode {  
public static int reverseNumber(int n)  
{
int a,r=0;  
while(n!=0)  
{
a=n%10;  
r=r*10+a;  
n=n/10;  
}
return r;  
}
}
8
. Array List Sorting and Merging  
Write a code to read two int array lists of size 5 each as input and to merge the two  
arrayLists, sort the merged arraylist in ascending order and fetch the elements at 2nd, 6th  
and 8th index into a new arrayList and return the final ArrayList.  
Include a class UserMainCode with a static method sortMergedArrayList which  
accepts 2  
ArrayLists.  
The return type is an ArrayList with elements from 2,6 and 8th index position .Array index  
starts from position 0.  
Create a Main class which gets two array list of size 5 as input and call the static  
methodsortMergedArrayList present in the UserMainCode.  
Input and Output Format:  
Input consists of two array lists of size 5.  
Output is an array list .  
Note - The first element is at index 0.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
1
1
1
1
5
2
7
6
2
7
1
9
0
Sample Output 1:  
3
1
1
1
9
Sample Input 2:  
1
2
3
4
5
6
7
8
9
1
0
Sample Output 2:  
3
7
9
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
ArrayList<Integer> list1=new ArrayList<Integer>();  
ArrayList<Integer> list2=new ArrayList<Integer>();  
ArrayList<Integer> newlist=new ArrayList<Integer>();  
for (int i = 0; i < 5; i++)  
{
list1.add(s.nextInt());  
}
for (int i = 0; i < 5; i++)  
{
list2.add(s.nextInt());  
}
newlist=UserMainCode.sortMergedArraylist(list1,list2);  
for (int i = 0; i < 3; i++)  
{
System.out.println(newlist.get(i));  
}
s.close();  
}
}
UERMAINCODE:  
import java.util.*;  
public class UserMainCode {  
public static ArrayList<Integer> sortMergedArraylist(ArrayList<Integer>  
list1,ArrayList<Integer> list2)  
{
list1.addAll(list2);  
Collections.sort(list1);  
ArrayList<Integer> ans=new ArrayList<Integer>();  
ans.add(list1.get(2));  
ans.add(list1.get(6));  
ans.add(list1.get(8));  
return ans;  
}
}
9
. Validating Date Format  
Obtain a date string in the format dd/mm/yyyy. Write code to validate the given date  
against the given format.  
Include a class UserMainCode with a static method validateDate which accepts a string .  
The return type of the validateDate method is 1 if the given date format matches the  
specified format , If the validation fails return the output as -1.  
Create a Main class which gets date string as an input and call the static  
method validateDate present in the UserMainCode.  
Input and Output Format:  
Input is a string .  
Refer sample output for formatting specifications  
Sample Input 1:  
1
2/06/1987  
Sample Output 1:  
Valid date format  
Sample Input 2:  
0
3/1/1987  
Sample Output 2:  
Invalid date format  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String s1=sc.nextLine();  
int b=UserMainCode.ValidateDate(s1);  
if(b==1){  
System.out.println("Valid date format");  
}
else{  
System.out.println("Invalid date format");  
}
sc.close();  
}
}
UserMainCode:  
import java.util.*;  
import java.text.*;  
public class UserMainCode{  
public static int ValidateDate(String s1) {  
if(s1.matches("[0-9]{2}[/]{1}[0-9]{2}[/]{1}[0-9]{4}"))  
{
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
sdf.setLenient(false);  
try {  
Date d1=sdf.parse(s1);  
return 1;  
}
catch (ParseException e) {  
return -1;  
}
}
else{  
return -1;}}}  
1
0. Validate Time  
Obtain a time string as input in the following format 'hh:mm am' or 'hh:mm pm'. Write code  
to validate it using the following rules:  
-
-
It should be a valid time in 12 hrs format  
It should have case insensitive AM or PM  
Include a class UserMainCode with a static method validateTime which accepts a string.  
If the given time is as per the given rules then return 1 else return -1.If the value returned is  
1
then print as valid time else print as Invalid time.  
Create a Main class which gets time(string value) as an input and call the static  
method validateTimepresent in the UserMainCode.  
Input and Output Format:  
Input is a string .  
Output is a string .  
Sample Input 1:  
0
9:59 pm  
Sample Output 1:  
Valid time  
Sample Input 2:  
1
0:70 AM  
Sample Output 2:  
Invalid time  
Main:  
import java.util.*;  
public class Main{  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
String str=sc.nextLine();  
int b=UserMainCode.ValidateTime(str);  
if(b==1){  
System.out.println("Valid time");  
}
else{  
System.out.println("Invalid time");  
}
sc.close();  
}
}
UserMainCode:  
import java.text.*;  
import java.util.*;  
public class UserMainCode{  
public static int ValidateTime(String str){  
StringTokenizer st=new StringTokenizer(str,":");  
if(st.countTokens()==3)  
{
SimpleDateFormat sdf1 = new SimpleDateFormat("h:mm:ss a");  
sdf1.setLenient(false);  
try  
{
Date d2=sdf1.parse(str);  
return 1;  
}
catch(Exception e)  
{
return -1;  
}
}
else  
{
SimpleDateFormat sdf = new SimpleDateFormat("h:mm a");  
sdf.setLenient(false);  
try  
{
Date d1=sdf.parse(str);  
return 1;  
}
catch(Exception e){  
return -1;  
}
}}}  
1
1. String Encryption  
Given an input as string and write code to encrypt the given string using following rules and  
return the encrypted string:  
1
. Replace the characters at odd positions by next character in alphabet.  
2
. Leave the characters at even positions unchanged.  
Note:  
-
-
If an odd position charater is 'z' replace it by 'a'.  
Assume the first character in the string is at position 1.  
Include a class UserMainCode with a static method encrypt which accepts a string.  
The return type of the output is the encrypted string.  
Create a Main class which gets string as an input and call the static method encrypt  
present  
in theUserMainCode.  
Input and Output Format:  
Input is a string .  
Output is a string.  
Sample Input 1:  
curiosity  
Sample Output 1:  
dusipsjtz  
Sample Input 2:  
zzzz  
Sample Output 2:  
Azaz  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
System.out.println(UserMainCode.encrypt(s1));  
s.close();  
}
}
UserMainCode:  
public class UserMainCode{  
public static String encrypt(String s1) {  
StringBuffer sb=new StringBuffer();  
for(int i=0;i<s1.length();i++){  
char c=s1.charAt(i);  
if(i%2==0){  
if(c==122)  
if((c==122)&&(i==0)){  
c='A';}  
else  
c=(char) (c-25);  
else{  
c=(char) (c+1);}  
sb.append(c);}  
else  
sb.append(c);}  
return sb.toString();  
}
}
1
2. Password Validation  
Given a method with a password in string format as input. Write code to validate the  
password using following rules:  
-
-
#
Must contain at least one digit  
Must contain at least one of the following special characters @, #, $  
Length should be between 6 to 20 characters.  
Include a class UserMainCode with a static method validatePassword which accepts a  
password string as input.  
If the password is as per the given rules return 1 else return -1.If the return value is 1 then  
print valid password else print as invalid password.  
Create a Main class which gets string as an input and call the static  
method validatePassword present in the UserMainCode.  
Input and Output Format:  
Input is a string .  
Output is a string .  
Sample Input 1:  
%Dhoom%  
Sample Output 1:  
Invalid password  
Sample Input 2:  
#@6Don  
Sample Output 2:  
Valid password  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args){  
Scanner s=new Scanner(System.in);  
String password=s.next();  
int b=UserMainCode.ValidatePassword(password);  
if(b==1){  
System.out.println("Valid Password");  
}
else{  
System.out.println("Invalid Password");  
}
s.close();  
}
}
UserMainCode:  
public class UserMainCode{  
public static int ValidatePassword(String password){  
if(password.matches(".*[0-9]{1,}.*") && password.matches(".*[@#$]{1,}.*")  
&
{
& password.length()>=6 && password.length()<=20)  
return 1;  
}
else  
{
return -1;  
}
}}  
1
3. Removing vowels from String  
Given a method with string input. Write code to remove vowels from even position in the  
string.  
Include a class UserMainCode with a static method removeEvenVowels which accepts  
a
string as input.  
The return type of the output is string after removing all the vowels.  
Create a Main class which gets string as an input and call the static  
method removeEvenVowels present in the UserMainCode.  
Input and Output Format:  
Input is a string .  
Output is a string .  
Assume the first character is at position 1 in the given string.  
Sample Input 1:  
commitment  
Sample Output 1:  
cmmitmnt  
Sample Input 2:  
capacity  
Sample Output 2:  
Cpcty  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
System.out.println(UserMainCode.removeEvenVowels(s1));  
s.close();  
}
}
UserMainCode:  
public class UserMainCode{  
public static String removeEvenVowels(String s1) {  
StringBuffer sb1=new StringBuffer();  
for(int i=0;i<s1.length();i++)  
if((i%2)==0)  
sb1.append(s1.charAt(i));  
else if((i%2)!=0)  
if(s1.charAt(i)!='a' && s1.charAt(i)!='e' &&  
s1.charAt(i)!='i' && s1.charAt(i)!='o' && s1.charAt(i)!='u')  
if(s1.charAt(i)!='A' && s1.charAt(i)!='E' &&  
s1.charAt(i)!='I' && s1.charAt(i)!='O' && s1.charAt(i)!='U')  
sb1.append(s1.charAt(i));  
return sb1.toString();  
}
}
1
4. Sum of Powers of elements in an array  
Given a method with an int array. Write code to find the power of each individual element  
accoding to its position index, add them up and return as output.  
Include a class UserMainCode with a static method getSumOfPower which accepts an  
integer array as input.  
The return type of the output is an integer which is the sum powers of each element in the  
array.  
Create a Main class which gets integer array as an input and call the static  
method getSumOfPowerpresent in the UserMainCode.  
Input and Output Format:  
Input is an integer array.First element corresponds to the number(n) of elements in an  
array.The next inputs corresponds to each element in an array.  
Output is an integer .  
Sample Input 1:  
4
3
6
2
1
Sample Output 1:  
1
2
Sample Input 2:  
4
5
3
7
2
Sample Output 2:  
6
1
Main:  
import java.util.Scanner;  
public class Main{  
public static void main(String args[]){  
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
int a[]=new int[n];  
for(int i=0;i<n;i++)  
{
a[i]=sc.nextInt();  
}
System.out.println(UserMainCode.getSumOfPower(n,a));  
sc.close();  
}
}
UserMainCode:  
public class UserMainCode{  
public static int getSumOfPower(int n,int[]a)  
{
{
int sum=0;  
for(int i=0;i<n;i++)  
sum=(int)(sum+Math.pow(a[i], i));  
return sum;  
}
}}  
1
5.Difference between largest and smallest elements in an array  
Given a method taking an int array having size more than or equal to 1 as input. Write code  
to return the difference between the largest and smallest elements in the array. If there is  
only one element in the array return the same element as output.  
Include a class UserMainCode with a static method getBigDiff which accepts a integer  
array  
as input.  
The return type of the output is an integer which is the difference between the largest and  
smallest elements in the array.  
Create a Main class which gets integer array as an input and call the static  
method getBigDiff present in the UserMainCode.  
Input and Output Format:  
Input is an integer array.First element in the input represents the number of elements in an  
array.  
Size of the array must be >=1  
Output is an integer which is the difference between the largest and smallest element in an  
array.  
Sample Input 1:  
4
3
6
2
1
Sample Output 1:  
5
Sample Input 2:  
4
5
3
7
2
Sample Output 2:  
5
Main:  
import java.util.*;  
public class Main {  
public static void main(String args[]){  
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
int a[]=new int[n];  
for(int i=0;i<n;i++)  
{
a[i]=sc.nextInt();  
}
System.out.println(UserMainCode.getBigDiff(a,n));  
sc.close();  
}
}
UserMainCode:  
import java.util.*;  
public class UserMainCode{  
public static int getBigDiff(int [] a,int n)  
{
Arrays.sort(a);  
int n1=a[a.length-1]-a[0];  
return n1;  
}
}
1
6.Find the element position in a reversed string array  
Given a method with an array of strings and one string variable as input. Write code to sort  
the given array in reverse alphabetical order and return the postion of the given string in the  
array.  
Include a class UserMainCode with a static method getElementPosition which accepts  
an  
array of strings and a string variable as input.  
The return type of the output is an integer which is the position of given string value from  
the array.  
Create a Main class which gets string array and a string variable as an input and call the  
static methodgetElementPosition present in the UserMainCode.  
Input and Output Format:  
Input is an string array. First element in the input represents the size the array  
Assume the position of first element is 1.  
Output is an integer which is the position of the string variable  
Sample Input 1:  
4
red  
green  
blue  
ivory  
ivory  
Sample Output 1:  
2
Sample Input 2:  
3
grape  
mango  
apple  
apple  
Sample Output 2:  
3
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
int fr=sc.nextInt();  
String a[]=new String[fr];  
for(int i=0;i<fr;i++)  
{
a[i]=sc.next();  
}
String ba=sc.next();  
UserMainCode.getElementPosition(a,ba);  
sc.close();  
}
}
UserMainCode:  
import java.util.*;  
public class UserMainCode{  
public static void getElementPosition(String[] a, String b) {  
ArrayList<String>al=new ArrayList<String>();  
for(int i=0;i<a.length;i++)  
{
al.add(a[i]);  
}
Collections.sort(al);  
Collections.reverse(al);  
for(int i=0;i<al.size();i++)  
{
if(b.equals(al.get(i)))  
{
System.out.println(i+1);  
}
}}}  
1
7.generate the series  
Given a method taking an odd positive Integer number as input. Write code to evaluate the  
following series:  
1
+3-5+7-9…+/-n.  
Include a class UserMainCode with a static method addSeries which accepts a positive  
integer .  
The return type of the output should be an integer .  
Create a class Main which would get the input as a positive integer and call the static  
method addSeriespresent in the UserMainCode.  
Input and Output Format:  
Input consists of a positive integer n.  
Output is a single integer .  
Refer sample output for formatting specifications.  
Sample Input 1:  
9
Sample Output 1:  
-3  
Sample Input 2:  
1
1
Sample Output 2:  
8
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
System.out.println(UserMainCode.addSeries(n));  
s.close();  
}
}
UserMainCode  
import java.util.ArrayList;  
import java.util.List;  
public class UserMainCode {  
public static int addSeries(int n){  
List<Integer> l1=new ArrayList<Integer>();  
for(int i=1;i<=n;i++)  
if(i%2!=0)  
l1.add(i);  
int n1=l1.get(0);  
for(int i=1;i<l1.size();i++)  
if(i%2!=0)  
n1=n1+l1.get(i);  
else  
n1=n1-l1.get(i);  
return n1;  
}
}
1
8.Calculate Electricity Bill  
Given a method calculateElectricityBill() with three inputs. Write code to calculate the  
current bill.  
Include a class UserMainCode with a static method calculateElectricityBill which  
accepts 3  
inputs .The return type of the output should be an integer .  
Create a class Main which would get the inputs and call the static  
method calculateElectricityBill present in the UserMainCode.  
Input and Output Format:  
Input consist of 3 integers.  
First input is previous reading, second input is current reading and last input is per unit  
charge.  
Reading Format - XXXXXAAAAA where XXXXX is consumer number and AAAAA is  
meter  
reading.  
Output is a single integer corresponding to the current bill.  
Refer sample output for formatting specifications.  
Sample Input 1:  
ABC2012345  
ABC2012660  
4
Sample Output 1:  
1
260  
Sample Input 2:  
ABCDE11111  
ABCDE11222  
3
Sample Output 2:  
3
33  
Main  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String input1=s.next();  
String input2=s.next();  
int input3=s.nextInt();  
System.out.println(UserMainCode.calculateElectricityBill(input1,input2,inpu  
t3));  
s.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static int calculateElectricityBill(String input1, String input2,  
int input3)  
{
int n1=Integer.parseInt(input1.substring(5, input1.length()));  
int n2=Integer.parseInt(input2.substring(5, input2.length()));  
int n=Math.abs((n2-n1)*input3);  
return n;  
}
}
1
9.Sum of Digits in a String  
Write code to get the sum of all the digits present in the given string.  
Include a class UserMainCode with a static method sumOfDigits which accepts string  
input.  
Return the sum as output. If there is no digit in the given string return -1 as output.  
Create a class Main which would get the input and call the static  
method sumOfDigits present in the UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output is a single integer which is the sum of digits in a given string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
good23bad4  
Sample Output 1:  
9
Sample Input 2:  
good  
Sample Output 2:  
-1  
Main  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
UserMainCode.sumOfDigits(s1);  
s.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static void sumOfDigits(String s1) {  
int sum=0;  
for(int i=0;i<s1.length();i++)  
{
char a=s1.charAt(i);  
if(Character.isDigit(a))  
{
int b=Integer.parseInt(String.valueOf(a));  
sum=sum+b;  
}
}
if(sum==0)  
{
System.out.println(-1);  
}
else  
System.out.println(sum);  
}
}
2
0.String Concatenation  
Write code to get two strings as input and If strings are of same length simply append them  
together and return the final string. If given strings are of different length, remove starting  
characters from the longer string so that both strings are of same length then append them  
together and return the final string.  
Include a class UserMainCode with a static method concatstring which accepts two  
string  
input.  
The return type of the output is a string which is the concatenated string.  
Create a class Main which would get the input and call the static  
method concatstring present in the UserMainCode.  
Input and Output Format:  
Input consists of two strings.  
Output is a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Hello  
hi  
Sample Output 1:  
lohi  
Sample Input 2:  
Hello  
Delhi  
Sample Output 2:  
HelloDelhi  
Main  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
String s2=s.next();  
UserMainCode.concatstring(s1,s2);  
s.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static void concatstring(String s1, String s2) {  
StringBuffer sb=new StringBuffer();  
int l1=s1.length();  
int l2=s2.length();  
if(l1==l2)  
{
sb.append(s1).append(s2);  
}
else if(l1>l2)  
{
sb.append(s1.substring(s1.length()-  
s2.length(),s1.length())).append(s2);  
}
else if(l1<l2)  
{
sb.append(s1).append(s2.substring(s2.length()-  
s1.length(),s2.length()));  
}
System.out.println(sb);  
}
}
2
1. Color Code  
Write a program to read a string and validate whether the given string is a valid color code  
based on the following rules:  
-
-
-
Must start with "#" symbol  
Must contain six characters after #  
It may contain alphabets from A-F or digits from 0-9  
Include a class UserMainCode with a static method validateColorCode which accepts a  
string. The return type (integer) should return 1 if the color is as per the rules else return -1.  
Create a Class Main which would be used to accept a String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string (Valid or Invalid).  
Refer sample output for formatting specifications.  
Sample Input 1:  
#
FF9922  
Sample Output 1:  
Valid  
Sample Input 2:  
#
FF9(22  
Sample Output 2:  
Invalid  
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
int b=UserMainCode.validateColorCode(s1);  
if(b==1)  
System.out.println("Valid");  
else  
System.out.println("Invalid");  
s.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static int validateColorCode(String s1) {  
int b=0,b1=0;  
String s2=s1.substring(1,s1.length());  
if(s1.length()==7)  
if(s1.charAt(0)=='#')  
b1=1;  
if(b1==1){  
/
*for(int i=0;i<s2.length();i++){  
char c=s2.charAt(i);  
if(c!='#')  
{
*/  
if(s2.matches("[A-F0-9]{1,}"))  
b=1;  
else  
b=-1;  
/
}
/break;  
return b;  
}
}
2
2.Three Digits  
Write a program to read a string and check if the given string is in the format "CTS-XXX"  
where XXX is a three digit number.  
Include a class UserMainCode with a static method validatestrings which accepts a  
string.  
The return type (integer) should return 1 if the string format is correct else return -1.  
Create a Class Main which would be used to accept a String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string (Valid or Invalid).  
Refer sample output for formatting specifications.  
Sample Input 1:  
CTS-215  
Sample Output 1:  
Valid  
Sample Input 2:  
CTS-2L5  
Sample Output 2:  
Invalid  
Main  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
int b=UserMainCode.validatestrings(s1);  
if(b==1){  
System.out.println("Valid");}  
else  
System.out.println("Invalid");  
s.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static int validatestrings(String s1) {  
int res=0;  
if(s1.matches("(CTS)[-]{1}[0-9]{3}"))  
{
res=1;  
}
else  
res=-1;  
return res;  
}
}
2
3.Removing Keys from HashMap  
Given a method with a HashMap<Integer,string> as input. Write code to remove all the  
entries having keys multiple of 4 and return the size of the final hashmap.  
Include a class UserMainCode with a static method sizeOfResultandHashMap which  
accepts hashmap as input.  
The return type of the output is an integer which is the size of the resultant hashmap.  
Create a class Main which would get the input and call the static  
method sizeOfResultandHashMap present in the UserMainCode.  
Input and Output Format:  
First input corresponds to the size of the hashmap.  
Input consists of a hashmap<integer,string>.  
Output is an integer which is the size of the hashmap.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
2
hi  
4
hello  
1
2
hello world  
Sample Output 1:  
1
Sample Input 2:  
3
2
hi  
4
sdfsdf  
3
asdf  
Sample Output 2:  
2
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
int s=sc.nextInt();  
HashMap<Integer, String>hm=new HashMap<Integer, String>();  
for(int i=0;i<s;i++){  
hm.put((sc.nextInt()),(sc.next()));  
}
System.out.println(UserMainCode.sizeOfResultandHashMap(hm));  
sc.close();  
}
}
UserMainCode  
import java.util.HashMap;  
import java.util.Iterator;  
public class UserMainCode {  
public static int sizeOfResultandHashMap(HashMap<Integer, String> hm) {  
int count=0;  
Iterator<Integer>itr=hm.keySet().iterator();  
while(itr.hasNext())  
{
int n=itr.next();  
if(n%4!=0)  
{
count++;  
}
}
return count;  
}
}
2
4.Largest Element  
Write a program to read an int array of odd length, compare the first, middle and the last  
elements in the array and return the largest. If there is only one element in the array return  
the same element.  
Include a class UserMainCode with a static method checkLargestAmongCorner  
which  
accepts an int arrayThe return type (integer) should return the largest element among the  
first, middle and the last elements.  
Create a Class Main which would be used to accept Input array and call the static method  
present in UserMainCode.  
Assume maximum length of array is 20.  
Input and Output Format:  
Input consists of n+1 integers. The first integer corresponds to n, the number of elements in  
the array. The next 'n' integers correspond to the elements in the array.  
Output consists of a single Integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
2
3
8
4
5
Sample Output 1:  
8
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
int a[]=new int[n];  
for(int i=0;i<n;i++){  
a[i]=s.nextInt();  
}
System.out.println(UserMainCode.checkLargestAmongCorner(a));  
s.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static int checkLargestAmongCorner(int []a)  
{
int max=0;  
int x,y,z;  
x=a[0];  
y=a[a.length/2];  
z=a[a.length-1];  
if(x>y && x>z)  
max=x;  
else if(y>x && y>z)  
max=y;  
else if(z>x && z>y)  
max=z;  
return max;  
}
}
2
5. nCr  
Write a program to calculate the ways in which r elements can be selected from n  
population, using nCr formula nCr=n!/r!(n-r)! where first input being n and second input  
being r.  
Note1 : n! factorial can be achieved using given formula n!=nx(n-1)x(n-2)x..3x2x1.  
Note2 : 0! = 1.  
Example 5!=5x4x3x2x1=120  
Include a class UserMainCode with a static method calculateNcr which accepts two  
integers. The return type (integer) should return the value of nCr.  
Create a Class Main which would be used to accept Input elements and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of 2 integers. The first integer corresponds to n, the second integer  
corresponds to r.  
Output consists of a single Integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
3
Sample Output 1:  
4
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
int r=s.nextInt();  
System.out.println(UserMainCode.calculateNcr(n,r));  
}
}
UserMainCode  
public class UserMainCode {  
public static int calculateNcr(int n, int r) {  
int fact=1,fact1=1,fact2=1;  
for(int i=1;i<=n;i++)  
{
fact=fact*i;  
}
/
/System.out.println(fact);  
for(int i=1;i<=r;i++)  
{
fact1=fact1*i;  
}
/
/System.out.println(fact1);  
for(int i=1;i<=(n-r);i++)  
{
fact2=fact2*i;  
}
/
/System.out.println(fact2);  
int res=fact/(fact1*fact2);  
return res;  
}
}
2
6.Sum of Common Elements  
Write a program to find out sum of common elements in given two arrays. If no common  
elements are found print - “No common elements”.  
Include a class UserMainCode with a static method getSumOfIntersection which  
accepts  
two integer arrays and their sizes. The return type (integer) should return the sum of  
common elements.  
Create a Class Main which would be used to accept 2 Input arrays and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of 2+m+n integers. The first integer corresponds to m (Size of the 1st array),  
the second integer corresponds to n (Size of the 2nd array), followed by m+n integers  
corresponding to the array elements.  
Output consists of a single Integer corresponds to the sum of common elements or a string  
“No common elements”.  
Refer sample output for formatting specifications.  
Assume the common element appears only once in each array.  
Sample Input 1:  
4
3
2
3
5
1
1
3
9
Sample Output 1:  
4
Sample Input 2:  
4
3
2
3
5
1
1
3
9
2
1
Sample Output 2:  
No common elements  
Main  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
int m=sc.nextInt();  
int[] a=new int[n];  
int[] b=new int[m];  
for(int i=0;i<n;i++){  
a[i]=sc.nextInt();}  
for(int i=0;i<m;i++){  
b[i]=sc.nextInt();}  
int u=UserMainCode.getSumOfIntersection (a,b,n,m);  
if(u==-1)  
System.out.println("No common elements");  
else  
System.out.println(u);  
sc.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static int getSumOfIntersection(int a[],int b[],int n,int m)  
{
int sum=0;  
for(int i=0;i<a.length;i++)  
{
for(int j=0;j<b.length;j++)  
{
if(a[i]==b[j])  
sum=sum+a[i];  
}
}
if(sum==0)  
return -1;  
else  
return sum;  
}
}
2
7.Validating Input Password  
1
02.Write a code get a password as string input and validate using the rules specified below.  
Apply following validations:  
1
2
3
4
5
. Minimum length should be 8 characters  
. Must contain any one of these three special characters @ or _ or #  
. May contain numbers or alphabets.  
. Should not start with special character or number  
. Should not end with special character  
Include a class UserMainCode with a static method validatePassword which accepts  
password string as input and returns an integer. The method returns 1 if the password is  
valid. Else it returns -1.  
Create a class Main which would get the input and call the static  
method validatePassword present in the UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output is a string Valid or Invalid.  
Refer sample output for formatting specifications.  
Sample Input 1:  
ashok_23  
Sample Output 1:  
Valid  
Sample Input 2:  
1
980_200  
Sample Output 2:  
Invalid  
Main  
import java.util.*;  
public class Main{  
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
String a=sc.next();  
int e=UserMainCode.validatePassword(a);  
if(e==1){  
System.out.println("Valid");  
}
else  
{
System.out.println("Invalid");  
}
sc.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static int validatePassword(String a){  
int d=0;  
if(a.length()>=8){  
if(a.contains("#") || a.contains("@") || a.contains("_"))  
{
char c= a.charAt(0);  
//System.out.println(c);  
if(Character.isAlphabetic(c))  
{
char dd=a.charAt(a.length()-1);  
//System.out.println(dd);  
if((Character.isAlphabetic(dd))||(Character.isDigit(dd)))  
{
if(a.matches(".*[0-9]{1,}.*")||a.matches(".*[a-zA-Z]{1,}.*")){  
d=1;  
}
}
}
}
}
else  
d=-1;  
return d;  
}
}
2
8.iD Validation  
Write a program to get two string inputs and validate the ID as per the specified format.  
Include a class UserMainCode with a static method validateIDLocations which accepts  
two  
strings as input.  
The return type of the output is a string Valid Id or Invalid Id.  
Create a class Main which would get the input and call the static  
method validateIDLocations present in the UserMainCode.  
Input and Output Format:  
Input consists of two strings.  
First string is ID and second string is location. ID is in the format CTS-LLL-XXXX where  
LLL is  
the first three letters of given location and XXXX is a four digit number.  
Output is a string Valid id or Invalid id.  
Refer sample output for formatting specifications.  
Sample Input 1:  
CTS-hyd-1234  
hyderabad  
Sample Output 1:  
Valid id  
Sample Input 2:  
CTS-hyd-123  
hyderabad  
Sample Output 2:  
Invalid id  
Main  
import java.util.*;  
public class Main3 {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String s1=sc.next();  
String s2=sc.next();  
boolean b=UserMainCode3.validateIDLocations(s1,s2);  
if(b==true)  
System.out.println("Valid id");  
else  
System.out.println("Invalid id");  
sc.close();  
}
}
UserMainCode  
import java.util.StringTokenizer;  
public class UserMainCode3 {  
public static boolean validateIDLocations(String s1, String s2) {  
String s3=s2.substring(0, 3);  
boolean b=false;  
StringTokenizer t=new StringTokenizer(s1,"-");  
String s4=t.nextToken();  
String s5=t.nextToken();  
String s6=t.nextToken();  
if(s4.equals("CTS") && s5.equals(s3) && s6.matches("[0-9]{4}"))  
b=true;  
else{  
b=false;}  
return b;  
}
}
2
9.Remove Elements  
Write a program to remove all the elements of the given length and return the size of the  
final array as output. If there is no element of the given length, return the size of the same  
array as output.  
Include a class UserMainCode with a static method removeElements which accepts a  
string  
array, the number of elements in the array and an integer. The return type (integer) should  
return the size of the final array as output.  
Create a Class Main which would be used to accept Input String array and a number and call  
the static method present in UserMainCode.  
Assume maximum length of array is 20.  
Input and Output Format:  
Input consists of a integers that corresponds to n, followed by n strings and finally m which  
corresponds to the length value.  
Output consists of a single Integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
a
bb  
b
ccc  
ddd  
2
Sample Output 1:  
4
Main  
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
int n=Integer.parseInt(sc.nextLine());  
String[] a=new String[n];  
for(int i=0;i<n;i++)  
a[i]=sc.nextLine();  
int m=Integer.parseInt(sc.nextLine());  
System.out.println(UserMainCode.removeElements(a,m));  
sc.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static int removeElements(String[] a,int m){  
int u=a.length;  
for(int i=0;i<a.length;i++)  
{
if(a[i].length()==m)  
u--;  
}
return u;  
}
}
3
0.Find the difference between Dates in months  
Given a method with two date strings in yyyy-mm-dd format as input. Write code to find the  
difference between two dates in months.  
Include a class UserMainCode with a static method getMonthDifference which accepts  
two  
date strings as input.  
The return type of the output is an integer which returns the diffenece between two dates  
in months.  
Create a class Main which would get the input and call the static  
method getMonthDifference present in the UserMainCode.  
Input and Output Format:  
Input consists of two date strings.  
Format of date : yyyy-mm-dd.  
Output is an integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
2
2
012-03-01  
012-04-16  
Sample Output 1:  
1
Sample Input 2:  
2
2
011-03-01  
012-04-16  
Sample Output 2:  
1
3
Main  
import java.text.*;  
import java.util.*;  
public class Main {  
public static void main(String[] args) throws ParseException {  
Scanner sc=new Scanner(System.in);  
String s1=sc.next();  
String s2=sc.next();  
System.out.println(UserMainCode.getMonthDifference(s1,s2));  
sc.close();  
}
}
UserMainCode  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.Calendar;  
import java.util.Date;  
public class UserMainCode {  
public static int getMonthDifference(String s1, String s2) throws  
ParseException {  
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");  
Date d1=sdf.parse(s1);  
Date d2=sdf.parse(s2);  
Calendar cal=Calendar.getInstance();  
cal.setTime(d1);  
int months1=cal.get(Calendar.MONTH);  
int year1=cal.get(Calendar.YEAR);  
cal.setTime(d2);  
int months2=cal.get(Calendar.MONTH);  
int year2=cal.get(Calendar.YEAR);  
int n=((year2-year1)*12)+(months2-months1);  
return n;  
}
}
3
1.Sum of cubes and squares of elements in an array  
Write a program to get an int array as input and identify even and odd numbers. If number  
is odd get cube of it, if number is even get square of it. Finally add all cubes and squares  
together and return it as output.  
Include a class UserMainCode with a static method addEvenOdd which accepts integer  
array as input.  
The return type of the output is an integer which is the sum of cubes and squares of  
elements in the array.  
Create a class Main which would get the input and call the static  
method addEvenOdd present in the UserMainCode.  
Input and Output Format:  
Input consists of integer array.  
Output is an integer sum.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
2
6
3
4
5
Sample Output 1:  
2
08  
Main  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
int a[]=new int[n];  
for(int i=0;i<n;i++){  
a[i]=sc.nextInt();  
}
System.out.println(UserMainCode.addEvenOdd(a));  
sc.close();  
}
}
UserMainCode  
public class UserMainCode6 {  
public static int addEvenOdd(int[] a) {  
int n1=0,n2=0;  
for(int i=0;i<a.length;i++)  
if(a[i]%2==0)  
n1+=(a[i]*a[i]);  
else  
n2+=(a[i]*a[i]*a[i]);  
return n1+n2;  
}
}
3
2.IP Validator  
Write a program to read a string and validate the IP address. Print “Valid” if the IP address is  
valid, else print “Invalid”.  
Include a class UserMainCode with a static method ipValidator which accepts a string.  
The  
return type (integer) should return 1 if it is a valid IP address else return 2.  
Create a Class Main which would be used to accept Input String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string that corresponds to an IP.  
Output consists of a string(“Valid” or “Invalid”).  
Refer sample output for formatting specifications.  
Note: An IP address has the format a.b.c.d where a,b,c,d are numbers between 0-255.  
Sample Input 1:  
1
32.145.184.210  
Sample Output 1:  
Valid  
Sample Input 2:  
1
32.145.184.290  
Sample Output 2:  
Invalid  
Main  
import java.util.*;  
public class Main7 {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String ipAddress=sc.next();  
boolean b=UserMainCode7.validateIpAddress(ipAddress);  
if(b==true)  
System.out.println("Valid");  
else  
System.out.println("Invalid");  
sc.close();  
}
}
UserMainCode  
import java.util.StringTokenizer;  
public class UserMainCode7 {  
public static boolean validateIpAddress(String ipAddress) {  
boolean b1=false;  
StringTokenizer t=new StringTokenizer(ipAddress,".");  
int a=Integer.parseInt(t.nextToken());  
int b=Integer.parseInt(t.nextToken());  
int c=Integer.parseInt(t.nextToken());  
int d=Integer.parseInt(t.nextToken());  
if((a>=0 && a<=255)&&(b>=0 && b<=255)&&(c>=0 && c<=255)&&(d>=0  
&
& d<=255))  
b1=true;  
return b1;  
}
}
3
3.Difference between two dates in days  
Get two date strings as input and write code to find difference between two dates in days.  
Include a class UserMainCode with a static method getDateDifference which accepts two  
date strings as input.  
The return type of the output is an integer which returns the diffenece between two dates  
in days.  
Create a class Main which would get the input and call the static  
method getDateDifference present in the UserMainCode.  
Input and Output Format:  
Input consists of two date strings.  
Format of date : yyyy-mm-dd.  
Output is an integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
2
2
012-03-12  
012-03-14  
Sample Output 1:  
2
Sample Input 2:  
2
2
012-04-25  
012-04-28  
Sample Output 2:  
3
Main  
import java.text.ParseException;  
import java.util.*;  
public class Main {  
public static void main(String[] args) throws ParseException  
{
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String s2=s.nextLine();  
int output=UserMainCode.getDateDifference(s1,s2);  
System.out.println(output);  
s.close();  
}
}
UserMainCode  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.*;  
public class UserMainCode {  
public static int getDateDifference(String s1,String s2) throws ParseException  
{
SimpleDateFormat sd=new SimpleDateFormat("yyyy-MM-dd");  
Date d=sd.parse(s1);  
Calendar c=Calendar.getInstance();  
c.setTime(d);  
long d1=c.getTimeInMillis();  
d=sd.parse(s2);  
c.setTime(d);  
long d2=c.getTimeInMillis();  
int n=Math.abs((int) ((d1-d2)/(1000*3600*24)));  
return n;  
}
}
3
4.File Extension  
Write a program to read a file name as a string and find out the file extension and return it  
as output. For example, the file sun.gif has the extension gif.  
Include a class UserMainCode with a static method fileIdentifier which accepts a string. The  
return type (string) should return the extension of the input string (filename).  
Create a Class Main which would be used to accept Input String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string that corresponds to a file name.  
Output consists of a string(extension of the input string (filename)).  
Refer sample output for formatting specifications.  
Sample Input 1:  
sun.gif  
Sample Output 1:  
Gif  
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
System.out.println("enter the string");  
String s1=s.nextLine();  
String output=UserMainCode.fileIdentifier(s1);  
System.out.println(output);  
s.close();  
}
}
UserMainCode  
import java.util.*;  
public class UserMainCode {  
public static String fileIdentifier(String s1)  
{
StringTokenizer t=new StringTokenizer(s1,".");  
t.nextToken();  
String s2=t.nextToken();  
return s2;  
}
}
3
5.Find common characters and unique characters in string  
Given a method with two strings as input. Write code to count the common and unique  
letters in the two strings.  
Note:  
-
-
Space should not be counted as a letter.  
Consider letters to be case sensitive. ie, "a" is not equal to "A".  
Include a class UserMainCode with a static method commonChars which accepts two  
strings as input.  
The return type of the output is the count of all common and unique characters in the two  
strings.  
Create a class Main which would get the inputs and call the static  
method commonChars present in the UserMainCode.  
Input and Output Format:  
Input consists of two strings.  
Output is an integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
a black cow  
battle ship  
Sample Output 1:  
2
[
Explanation : b, l and a are the common letters between the 2 input strings. But 'a'  
appears  
more than once in the 1st string. So 'a' should not be considered while computing the count  
value.]  
Sample Input 2:  
australia  
sri lanka  
Sample Output 2:  
4
Main  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String s1=sc.nextLine();  
String s2=sc.nextLine();  
StringBuffer sb1=new StringBuffer(s1.replace(" ",""));  
StringBuffer sb2=new StringBuffer(s2.replace(" ",""));  
int output=UserMainCode.commonChars(s1,s2,sb1,sb2);  
System.out.println(output);  
sc.close();  
}
}
UserMainCode  
import java.util.*;  
public class UserMainCode {  
public static int commonChars(String s1,String s2,StringBuffer sb1,StringBuffer  
sb2) {  
for(int i=0;i<sb1.length();i++){  
int c=0;  
for(int j=i+1;j<sb1.length();j++){  
if(sb1.charAt(i)==sb1.charAt(j)){  
sb1.deleteCharAt(j);  
c++;  
}
}
if(c>=1){  
sb1.deleteCharAt(i);  
}
}
for(int i=0;i<sb2.length();i++){  
int c=0;  
for(int j=i+1;j<sb2.length();j++){  
if(sb2.charAt(i)==sb2.charAt(j)){  
sb2.deleteCharAt(j);  
c++;  
}
}
if(c>=1){  
sb2.deleteCharAt(i);  
}
}
int count=0;  
for(int i=0;i<sb1.length();i++){  
for(int j=0;j<sb2.length();j++){  
if(sb1.charAt(i)==sb2.charAt(j)){  
count++;  
}
}
}
return (count);  
}
}
3
6.Initial Format  
Write a program to input a person's name in the format "FirstName LastName" and return  
the person name in the following format - "LastName, InitialOfFirstName".  
Include a class UserMainCode with a static method nameFormatter which accepts a  
string.  
The return type (string) should return the expected format.  
Create a Class Main which would be used to accept Input String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string that corresponds to a Person's name.  
Output consists of a string(person's name in expected format).  
Refer sample output for formatting specifications.  
Sample Input :  
Jessica Miller  
Sample Output:  
Miller, J  
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String output=UserMainCode.nameFormatter(s1);  
System.out.println(output);  
s.close();  
}
}
UserMainCode  
import java.util.*;  
public class UserMainCode {  
public static String nameFormatter(String s1) {  
StringBuffer sb=new StringBuffer();  
StringTokenizer st=new StringTokenizer(s1," ");  
String s2=st.nextToken();  
String s3=st.nextToken();  
sb.append(s3).append(",");  
sb.append(s2.substring(0,1).toUpperCase());  
return sb.toString();  
}
}
3
7.Character cleaning  
Write a program to input a String and a character, and remove that character from the given  
String. Print the final string.  
Include a class UserMainCode with a static method removeCharacter which accepts a  
string  
and a character. The return type (string) should return the character cleaned string.  
Create a Class Main which would be used to accept Input String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string and a character.  
Output consists of a string(the character cleaned string).  
Refer sample output for formatting specifications.  
Sample Input :  
elephant  
e
Sample Output:  
Lphant  
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String c=s.nextLine();  
String output=UserMainCode.removeCharacter(s1,c);  
System.out.println(output);  
}
}
UserMainCode  
import java.util.*;  
public class UserMainCode {  
public static String removeCharacter(String s1,String c)  
{
String d=s1.replace(c,"");  
return d;  
}
}
3
8.Vowel Check  
Write a program to read a String and check if that String contains all the vowels. Print "yes"  
if the string contains all vowels else print "no".  
Include a class UserMainCode with a static method getVowels which accepts a string. The  
return type (integer) should return 1 if the String contains all vowels else return -1.  
Create a Class Main which would be used to accept Input String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string("yes" or "no").  
Refer sample output for formatting specifications.  
Sample Input 1:  
abceiduosp  
Sample Output 1:  
yes  
Sample Input 2:  
bceiduosp  
Sample Output 2:  
No  
Main  
import java.util.*;  
public class User {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String s2=s1.toLowerCase();  
int output=UserMainCode.getVowels(s2);  
/
/System.out.println(output);  
if(output==1)  
{
System.out.println("yes");  
}
else  
System.out.println("no");  
s.close();  
}
}
UserMainCode  
import java.util.*;  
public class UserMainCode {  
public static int getVowels(String s2) {  
if(s2.contains("a") && s2.contains("e") && s2.contains("i") && s2.contains("o") &&  
s2.contains("u") )  
{
return 1;  
}
else  
return -1;  
}
}
3
9.Swap Characters  
Write a program to input a String and swap the every 2 characters in the string. If size is an  
odd number then keep the last letter as it is. Print the final swapped string.  
Include a class UserMainCode with a static method swapCharacter which accepts a string.  
The return type (String) should return the character swapped string.  
Create a Class Main which would be used to accept Input String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
TRAINER  
Sample Output 1:  
RTIAENR  
Sample Input 2:  
TOM ANDJERRY  
Sample output 2:  
OT MNAJDREYR  
Main  
import java.util.*;  
public class Main  
{
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String output=UserMainCode.swapCharacter(s1);  
System.out.println(output);  
s.close();  
}
}
UserMainCode  
import java.util.*;  
public class UserMainCode {  
public static String swapCharacter(String s1)  
{
StringBuffer sb=new StringBuffer();  
int l=s1.length();  
if(l%2==0)  
{
for(int i=0;i<s1.length()-1;i=i+2)  
{
char a=s1.charAt(i);  
char b=s1.charAt(i+1);  
sb.append(b).append(a);  
}
return sb.toString();  
}
else  
{
for(int i = 0;i<s1.length()-1;i=i+2)  
{
char a=s1.charAt(i);  
char b=s1.charAt(i+1);  
sb.append(b).append(a);  
}
sb.append(s1.charAt(l-1));  
return sb.toString();  
}
}
}
4
0.Average of Elements in Hashmap  
Given a method with a HashMap<int, float> as input. Write code to find out avg of all  
values whose keys are even numbers. Round the average to two decimal places and return  
as output.  
[
Hint : If the average is 5.901, the rounded average value is 5.9 . It the average is 6.333, the  
rounded average value is 6.33 . ]  
Include a class UserMainCode with a static method avgOfEven which  
accepts a HashMap<int, float> as input.  
The return type of the output is a floating point value which is the average of all values  
whose key elements are even numbers.  
Create a class Main which would get the input and call the static method avgOfEven  
present  
in the UserMainCode.  
Input and Output Format:  
Input consists of the number of elements in the HashMap and the HashMap<int, float>.  
Output is a floating point value that corresponds to the average.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
1
2
2
4
6
6
.3  
.1  
.2  
Sample Output 1:  
.15  
5
Sample Input 2:  
3
9
3
4
6
1
2
.1  
.3  
.6  
Sample Output 2:  
.3  
6
Main  
import java.util.HashMap;  
import java.util.Scanner;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
int s=sc.nextInt();  
HashMap<Integer,Float>hm=new HashMap<Integer,Float>();  
for(int i=0;i<s;i++)  
{
int r=sc.nextInt();  
Float j=sc.nextFloat();  
hm.put(r,j);  
}
System.out.println(UserMainCode.display(hm));  
sc.close();  
}
}
UserMainCode  
import java.text.DecimalFormat;  
import java.util.*;  
public class UserMainCode  
{
public static String display(HashMap<Integer,Float>hm)  
{
float sum=0;  
int count=0;  
DecimalFormat df=new DecimalFormat("#.00");  
Iterator<Integer> it=hm.keySet().iterator();  
while(it.hasNext())  
{
int y=it.next();  
if(y%2==0)  
{
sum=(float) (sum+hm.get(y));  
count++;  
}
}
float d=sum/count;  
return df.format(d);  
}
}
4
1.Calculate Average – Hash Map  
Write amethod that accepts the input data as a hash map and finds out the avg of all values  
whose keys are odd numbers.  
Include a class UserMainCode with a static method calculateAverage which accepts  
aHashMap<Integer,Double> and the size of the HashMap. The return type (Double) should  
return the calculated average. Round the average to two decimal places and return it.  
Create a Class Main which would be used to accept Input values and store it as a hash map,  
and call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of an integer n corresponds to number of hash map values, followed by 2n  
values. (index followed by value).  
Output consists of a Double.  
Refer sample input and output for formatting specifications.  
Sample Input :  
4
1
3
2
4
3
1
4
2
.41  
.1  
.61  
.5  
Sample Output :  
2
.51  
Main  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] arg)  
{
HashMap<Integer,Double> hm=new HashMap<Integer,Double>();  
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
for(int i=0;i<n;i++)  
{
int a=sc.nextInt();  
double s=sc.nextDouble();  
hm.put(a,s);  
}
System.out.println(UserMaincode.dis(hm));}}  
UserMainCode  
class UserMaincode  
{
public static double dis(HashMap<Integer,Double> h1)  
{
double avg=0.0,sum=0.0;  
int k=0;  
for(Map.Entry m:h1.entrySet())  
{
int a=(Integer)m.getKey();  
if(a%2!=0)  
{
Double d=(Double) m.getValue();  
sum=sum+d;  
k++;  
}
}
avg = (double)sum/k;  
DecimalFormat df = new DecimalFormat(".##");  
String b1 = df.format(avg);  
double b = Double.parseDouble(b1);  
return b;}  
4
2.Count Sequential Characters  
1
09.Get a string as input and write code to count the number of characters which gets  
repeated 3 times consecutively and return that count (ignore case). If no character gets  
repeated 3 times consecutively return -1.  
Include a class UserMainCode with a static method countSequentialChars which  
accepts a  
string as input.  
The return type of the output is the repeat count.  
Create a class Main which would get the input and call the static  
method countSequentialChars present in the UserMainCode.  
Input and Output Format:  
Input consists a string.  
Output is an integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
abcXXXabc  
Sample Output 1:  
1
Sample Input 2:  
aaaxxyzAAAx  
Sample Output 2:  
2
Main  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner (System.in);  
String input1=sc.next();  
System.out.println(UserMainCode.consecutiveRepeatitionOfChar(input1));  
}
}
UserMainCode  
class UserMainCode  
{
public static int consecutiveRepeatitionOfChar(String input1)  
{
int c=0;  
int n=0;  
for(int i=0;i<input1.length()-1;i++){  
if(input1.charAt(i)==input1.charAt(i+1))  
n++;  
else  
n=0;  
if(n==2)  
c++; }  
return c;  
}
}
4
3.Length of the Largest Chunk  
Write a program to read a string and find the length of the largest chunk in the string. If  
there are no chunk print “No chunks” else print the length.  
NOTE: chunk is the letter which is repeating 2 or more than 2 times.  
Include a class UserMainCode with a static method largestChunk which accepts a  
string.  
The return type (Integer) should return the length of the largest chunk if the chunk is  
present, else return -1.  
Create a Class Main which would be used to accept Input String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
You are toooo good  
Sample Output 1:  
4
(Because the largest chunk is letter 'o' which is repeating 4 times)  
Sample Input 2:  
who are u  
Sample Output 2:  
No chunks  
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String s1=sc.nextLine();  
System.out.println(UserMainCode.largestChunk(s1));  
}
}
UserMaincode  
class UserMainCode  
{
public static int largestChunk(String s1) {  
int max=1;  
int b=0;  
StringTokenizer t=new StringTokenizer(s1," ");  
while(t.hasMoreTokens()){  
String s2=t.nextToken();  
int n=0;  
for(int i=0;i<s2.length()-1;i++)  
if(s2.charAt(i)==s2.charAt(i+1))  
n++;  
if(n>max)  
{
max=n;  
b=max+1;  
}
}
return b;  
}
}
4
4.Unique Characters in a string  
Write a program that takes a string and returns the number of unique characters in the  
string. If the given string doest not contain any unique characters return -1  
Include a class UserMainCode with a static method uniqueCounter which accepts a  
string as  
input.  
The return type of the output is the count of all unique characters in the strings.  
Create a class Main which would get the input and call the static  
method uniqueCounter present in the UserMainCode.  
Input and Output Format:  
Input consists a string.  
Output is an integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
HelloWorld  
Sample Output 1:  
5
Sample Input 2:  
coco  
Sample Output 2:  
-
1
Main  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) throws ParseException {  
Scanner sc = new Scanner(System.in);  
String s1 = sc.nextLine();  
System.out.println(UserMaincode.uniqueCounter(s1));  
}
}
UserMainCode  
class UserMaincode  
{
public static int uniqueCounter(String s1)  
{
StringBuffer sb = new StringBuffer(s1);  
for (int i = 0; i < sb.length(); i++) {  
int count = 0;  
for (int j = i + 1; j < sb.length(); j++) {  
if (sb.charAt(i) == sb.charAt(j)) {  
sb.deleteCharAt(j);  
j--;  
count++;  
}
}
if (count >= 1) {  
sb.deleteCharAt(i);  
i--;  
}
}
return sb.length();  
}
}
4
5.Name Shrinking  
Write a program that accepts a string as input and converts the first two names into  
dotseparated  
initials and printa the output.  
Input string format is 'fn mn ln'. Output string format is 'ln [mn's 1st character].[fn's 1st  
character]'  
Include a class UserMainCode with a static method getFormatedString which accepts a  
string. The return type (String) should return the shrinked name.  
Create a Class Main which would be used to accept Input String and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a String.  
Refer sample output for formatting specifications.  
Sample Input:  
Sachin Ramesh Tendulkar  
Sample Output:  
Tendulkar R.S  
Main  
import java.text.*;  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String s1=sc.nextLine();  
System.out.println(UserMainCode.getFormatedString(s1));  
}
}
UserMainCode  
class UserMainCode  
{
public static String getFormatedString(String s1) {  
StringBuffer sb=new StringBuffer();  
StringTokenizer st=new StringTokenizer(s1," ");  
String s2=st.nextToken();  
String s3=st.nextToken();  
String s4=st.nextToken();  
sb.append(s4).append(" ");  
sb.append(s3.substring(0,1));  
sb.append(".");  
sb.append(s2.substring(0,1));  
return sb.toString();  
}
}
4
6.Odd Digit Sum  
Write a program to input a String array. The input may contain digits and alphabets  
“de5g4G7R”). Extract odd digits from each string and find the sum and print the output.  
(
For example, if the string is "AKj375A" then take 3+7+5=15 and not as 375 as digit.  
Include a class UserMainCode with a static method oddDigitSum which accepts a string  
array and the size of the array. The return type (Integer) should return the sum.  
Create a Class Main which would be used to accept Input Strings and call the static method  
present in UserMainCode.  
Assume maximum length of array is 20.  
Input and Output Format:  
Input consists of an integer n, corresponds to the number of strings, followed by n Strings.  
Output consists of an Integer.  
Refer sample output for formatting specifications.  
Sample Input :  
3
cog2nizant1  
al33k  
d2t4H3r5  
Sample Output :  
1
5
(1+3+3+3+5)  
Main  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner sc = new Scanner(System.in);  
int s1=sc.nextInt();  
String[] s2 = new String[s1];  
for (int i = 0; i < s1; i++) {  
s2[i] = sc.next();  
}
System.out.println(UserMainCode. oddDigitSum(s2));  
}
}
UserMainCode  
public class UserMainCode {  
public static int oddDigitSum (String[] s1) {  
int sum=0;  
for(int i=0;i<s1.length;i++)  
for(int j=0;j<s1[i].length();j++){  
char c=s1[i].charAt(j);  
if(Character.isDigit(c)){  
if(c%2!=0)  
{
String t=String.valueOf(c);  
int n=Integer.parseInt(t);  
sum=sum+n; } }}  
return sum;  
}
}
4
7.Unique Number  
Write a program that accepts an Integer as input and finds whether the number is Unique or  
not. Print Unique if the number is “Unique”, else print “Not Unique”.  
Note: A Unique number is a positive integer (without leading zeros) with no duplicate  
digits.For example 7, 135, 214 are all unique numbers whereas 33, 3121, 300 are not.  
Include a class UserMainCode with a static method getUnique which accepts an integer.  
The return type (Integer) should return 1 if the number is unique else return -1.  
Create a Class Main which would be used to accept Input Integer and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of an integer .  
Output consists of a String (“Unique” or “Not Unique”).  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
23  
Sample Output 1:  
Unique  
Sample Input 2:  
3
3
Sample Output 2:  
Not Unique  
import java.util.*;  
import java.text.*;  
public class Main{  
public static void main(String[]args)  
{
int j=0;  
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
j=UserMainCode.getUnique(n);  
if(j>0)  
{
System.out.println("Not Unique");  
}
else if(j==0)  
{
System.out.println("Unique");  
}
}
}
class UserMainCode  
{
public static int getUnique(int n)  
{
int []a=new int[100];  
int i=0,count=0;  
while(n!=0)  
{
int num=n%10;  
a[i]=num;  
i++;  
n=n/10;  
}
for(int j=0;j<=i-1;j++)  
{
for(int k=j+1;k<=i-1;k++)  
{
if(a[j]==a[k]){  
count++;  
}
}
}
return count;  
}
}
4
8.Sum of Lowest marks  
Given input as HashMap, value consists of marks and rollno as key.Find the sum of the  
lowest three subject marks from the HashMap.  
Include a class UserMainCode with a static method getLowest which accepts a  
Hashmap  
with marks and rollno.  
The return type of the output is the sum of lowest three subject marks.  
Create a class Main which would get the input and call the static method getLowest  
present  
in the UserMainCode.  
Input and Output Format:  
First line of the input corresponds to the HashMap size.  
Input consists a HashMap with marks and rollno.  
Output is an integer which is the sum of lowest three subject marks.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
1
5
2
8
3
7
4
5
5
5
4
5
4
9
7
Sample Output 1:  
1
70  
Sample Input 2:  
4
1
5
2
5
3
8
4
5
0
6
0
8
0
7
0
4
Sample Output 2:  
68  
1
Main  
import java.util.*;  
public class Main {  
public static void main(String args[]){  
Scanner sc = new Scanner(System.in);  
int n=Integer.parseInt(sc.nextLine());  
HashMap<Integer,Integer>h1=new HashMap<Integer,Integer>();  
for(int i=0;i<n;i++)  
{
h1.put(sc.nextInt(),sc.nextInt());  
}
System.out.println(UserMainCode.getLowest(h1));  
}
}
UserMainCode  
class UserMainCode {  
public static int getLowest(HashMap<Integer,Integer>h1)  
{
ArrayList<Integer>a1=new ArrayList<Integer>();  
int m=0;  
Iterator<Integer> it=h1.keySet().iterator();  
while(it.hasNext())  
{
int x=it.next();  
a1.add(h1.get(x));  
}
Collections.sort(a1);  
m=a1.get(0)+a1.get(1)+a1.get(2);  
return m;  
}
}
4
9.Color Code Validation same as 21  
Give a String as colour code as input and write code to validate whether the given string is a  
valid color code or not.  
Validation Rule:  
String should start with the Character '#'.  
Length of String is 7.  
It should contain 6 Characters after '#' Symbol.  
It should contain Characters between 'A-F' and Digits '0-9'.  
If String acceptable the return true otherwise false.  
Include a class UserMainCode with a static method validateColourCode which accepts a  
string as input.  
The return type of the output is a boolean which returns true if its is a valid color code else it  
returns false.  
Create a class Main which would get the input and call the static  
method validateColourCode present in the UserMainCode.  
Input and Output Format:  
Input consists a string corresponding to the color code.  
Output is a boolean which returns true or false  
Refer sample output for formatting specifications.  
Sample Input 1:  
#99FF33  
Sample Output 1:  
true  
Sample Input 2:  
#CCCC99#  
Sample Output 2:  
False  
Main  
import java.util.*;  
public class Add {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
boolean b=userMainCode. validateColourCode (s1);  
if(b==true)  
System.out.println("valid color code");  
else  
System.out.println("invalid color code");  
}
UserMainCode  
static class userMainCode{  
public static boolean validateColourCode (String s1)  
boolean b=false;  
if(s1.length()==7&&s1.matches("#[A-F0-9]{1,}")){  
b=true;  
}
return b;  
}
}}  
5
0.Repeating set of characters in a string  
Get a string and a positive integer n as input .The last n characters should repeat the  
number of times given as second input.Write code to repeat the set of character from the  
given string.  
Include a class UserMainCode with a static method getString which accepts a string and  
an  
integer n as input.  
The return type of the output is a string with repeated n characters.  
Create a class Main which would get the input and call the static method getString  
present  
in the UserMainCode.  
Input and Output Format:  
Input consists a string and a positive integer n.  
Output is a string with repeated characters.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Cognizant  
3
Sample Output 1:  
Cognizantantantant  
Sample Input 2:  
myacademy  
2
Sample Output 2:  
Myacademymymy  
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s= new Scanner(System.in);  
String input= s.next();  
int n=s.nextInt();  
System.out.println(userMainCode.getString(input,n));  
}
}
UserMainCode  
class userMainCode {  
public static String getString(String input, int n){  
StringBuffer sb=new StringBuffer();  
sb.append(input);  
for (int i=0;i<n;i++){  
sb.append(input.substring(input.length()-n,input.length()));  
}
return sb.toString();  
}
}
5
1.Finding the day of birth  
Given an input as date of birth of person, write a program to calculate on which day  
MONDAY,TUESDAY....) he was born store and print the day in Upper Case letters.  
(
Include a class UserMainCode with a static method calculateBornDay which accepts a  
string  
as input.  
The return type of the output is a string which should be the day in which the person was  
born.  
Create a class Main which would get the input and call the static  
method calculateBornDay present in the UserMainCode.  
Input and Output Format:  
NOTE: date format should be(dd-MM-yyyy)  
Input consists a date string.  
Output is a string which the day in which the person was born.  
Refer sample output for formatting specifications.  
Sample Input 1:  
2
9-07-2013  
Sample Output 1:  
MONDAY  
Sample Input 2:  
1
4-12-1992  
Sample Output 2:  
MONDAY  
Main  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) throws ParseException {  
Scanner s= new Scanner(System.in);  
String input= s.next();  
System.out.println(userMainCode.calculateBornDay(input));  
}
}
UserMainCode  
class userMainCode{  
public static String calculateBornDay(String input) throws ParseException{  
SimpleDateFormat sdf= new SimpleDateFormat("dd-MM-yyyy");  
SimpleDateFormat sdf1= new SimpleDateFormat("EEEEE");  
Date d= sdf.parse(input);  
String s1= sdf1.format(d);  
return s1;  
}
}
5
2.Removing elements from HashMap  
Given a HashMap as input, write a program to perform the following operation : If the keys  
are divisible by 3 then remove that key and its values and print the number of remaining  
keys in the hashmap.  
Include a class UserMainCode with a static method afterDelete which accepts a  
HashMap  
as input.  
The return type of the output is an integer which represents the count of remaining  
elements in the hashmap.  
Create a class Main which would get the input and call the static  
method afterDelete present in the UserMainCode.  
Input and Output Format:  
First input corresponds to the size of hashmap  
Input consists a HashMap  
Output is an integer which is the count of remaining elements in the hashmap.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
3
39  
RON  
010  
JONS  
366  
SMITH  
020  
1
3
2
TIM  
Sample Output 1:  
2
Sample Input 2:  
5
1
010  
C2WE  
252  
XY4E  
212  
6
1
M2ED  
070  
S2M41ITH  
585  
7
8
J410N  
Sample Output 2:  
3
Main  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s= new Scanner(System.in);  
HashMap<Integer, String>hm=new HashMap<Integer, String>();  
int n= s.nextInt();  
for(int i=0;i<n;i++){  
hm.put(s.nextInt(),s.next());  
}
System.out.println(UserMainCode.afterDelete(hm));  
s.close();  
}
}
UserMainCode  
class UserMainCode{  
public static int afterDelete(HashMap<Integer, String> hm){  
int count=0;  
Iterator<Integer>itr=hm.keySet().iterator();  
while(itr.hasNext())  
{
int n=itr.next();  
if(n%3!=0)  
{
count++;  
}
}
return count;  
}
}
5
3.Experience Calculator  
Write a program to read Date of Joining and current date as Strings and Experience  
as integer and validate whether the given experience and calculated experience are the  
same. Print “true” if same, else “false”.  
Include a class UserMainCode with a static method calculateExperience which accepts  
2
strings and an integer. The return type is boolean.  
Create a Class Main which would be used to accept 2 string (dates) and an integer and call  
the static method present in UserMainCode.  
Input and Output Format:  
Input consists of 2 strings and an integer, where the 2 strings corresponds to the date of  
joining and current date, and the integer is the experience.  
Output is either “true” or “false”.  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
0
4
1/01/2010  
1/09/2014  
Sample Output 1:  
true  
Sample Input 2:  
1
0
4
1/06/2009  
1/09/2014  
Sample Output 2:  
False  
Main  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args)throws ParseException {  
Scanner sc=new Scanner(System.in);  
String a=sc.next();  
String b=sc.next();  
int c=sc.nextInt();  
long res=(userMainCode.calculateExperience(a,b,c));  
if(res==c)  
{
System.out.println("true");  
}
else  
System.out.println("false");  
}
}
UserMainCode  
class userMainCode{  
public static long calculateExperience(String a, String b, int c)throws  
ParseException{  
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
Date d=new Date();  
Date d1=new Date();  
d=sdf.parse(a);  
d1=sdf.parse(b);  
long t=d.getTime();  
long t1=d1.getTime();  
long t3=t1-t;  
long l1=(24 * 60 * 60 * 1000);  
long l=l1*365;  
long res=t3/l;  
return res;  
}
}
5
4.Flush Characters  
Write a program to read a string from the user and remove all the alphabets and  
spaces from the String, and only store special characters and digit in the output  
String. Print  
the output string.  
Include a class UserMainCode with a static method getSpecialChar which accepts a  
string.  
The return type (String) should return the character removed string.  
Create a Class Main which would be used to accept a string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a strings.  
Output consists of an String (character removed string).  
Refer sample output for formatting specifications.  
Sample Input :  
cogniz$#45Ant  
Sample Output :  
$
#45  
Main:  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s= new Scanner(System.in);  
String input=s.next();  
System.out.println(UserMainCode.getSpecialChar(input));  
}
}
UserMainCode:  
class UserMainCode{  
public static String getSpecialChar(String input){  
int i;  
StringBuffer sb= new StringBuffer();  
for(i=0;i<input.length();i++)  
{
char a=input.charAt(i);  
if (!Character.isAlphabetic(a))  
sb.append(a);  
}
return sb.toString();  
}
}
5
5.String Repetition  
Write a program to read a string and an integer and return a string based on the below  
rules.  
If input2 is equal or greater than 3 then repeat the first three character of the String by  
given input2 times, separated by a space.  
If input2 is 2 then repeat the first two character of String two times separated by a space,  
If input2 is 1 then return the first character of the String.  
Include a class UserMainCode with a static method repeatString which takes a string &  
integer and returns a string based on the above rules.  
Create a Class Main which would be used to accept Input string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string and integer.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
COGNIZANT  
4
Sample Output 1:  
COG COG COG COG  
Sample Input 2:  
COGNIZANT  
2
Sample Output 2:  
CO CO  
class Main{  
public static void main(String[] args) {  
Scanner s= new Scanner(System.in);  
System.out.println(“enter a string”);  
String input= s.next();  
int n= s.nextInt();  
System.out.println(UserMainCode.repeatString(input, n));  
}
}
class UserMainCode{  
public static String repeatString(String input, int n){  
StringBuffer sb= new StringBuffer();  
String s1= new String();  
if (n==1){  
s1=input.substring(0,1);  
sb.append(s1).append(" ");  
}
if(n==2){  
s1=input.substring(0,2);  
for(int i=0;i<n;i++)  
sb.append(s1).append(" ");  
}
if(n>=3){  
s1=input.substring(0,3);  
for(int i=0;i<n;i++)  
sb.append(s1).append(" ");  
}
return sb.toString();  
}
}
5
6.Average of Prime Locations  
Write a program to read an integer array and find the average of the numbers located on  
the Prime location(indexes).  
Round the avarage to two decimal places.  
Assume that the array starts with index 0.  
Include a class UserMainCode with a static method averageElements which accepts a  
single  
integer array. The return type (double) should be the average.  
Create a Class Main which would be used to accept Input array and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of n+1 integers. The first integer corresponds to n, the number of elements in  
the array. The next 'n' integers correspond to the elements in the array.  
Output consists of a single Double value.  
Refer sample output for formatting specifications.  
Assume that the maximum number of elements in the array is 20.  
Sample Input 1:  
8
4
1
7
6
5
8
6
9
Sample Output 1:  
7
.5  
Main:  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s= new Scanner(System.in);  
int n,i;  
System.out.println("enter the array size");  
n=s.nextInt();  
int array[]=new int[n];  
for(i=0;i<n;i++){  
array[i]=s.nextInt();  
}
System.out.println(UserMainCode.AverageElements(array));  
s.close();  
}
}
UserMainCode:  
class UserMainCode{  
public static double AverageElements(int array[]){  
int n, sum=0,count=0,count1=0;  
double average;  
n=array.length;  
for(int i=0;i<=n;i++){  
for(int j=1;j<n;j++){  
if(i%j==0)  
count++;  
if(count==2){  
sum= sum+array[i];  
count1++;  
}
}
}
average= sum/count1;  
DecimalFormat df=new DecimalFormat("#.00");  
double ddd=Double.parseDouble(df.format(average));  
return ddd;  
}
}
5
7.Common Elements  
Write a program to read two integer arrays and find the sum of common elements in both  
the arrays. If there are no common elements return -1 as output Include a class  
UserMainCode with a static method sumCommonElements which accepts two single integer  
array. The return type (integer) should be the sum of common elements.  
Create a Class Main which would be used to accept Input array and call the static method  
present in UserMainCode. Assume that all the elements will be distinct. Input and Output  
Format: Input consists of 2n+1 integers. The first integer corresponds to n, the number of  
elements in the array. The next 'n' integers correspond to the elements in the array, The last n  
elements correspond to the elements of the second array. Output consists of a single Integer  
value. Refer sample output for formatting specifications.  
Assume that the maximum number of elements in the array is 20.  
Sample Input 1:  
4
1
2
3
4
2
3
6
7
Sample Output 1:  
5
Main:  
import java.util.*;  
public class Main {  
private static Scanner s ;  
;
public static void main(String[] args) {  
s = new Scanner (System.in);  
int n = s.nextInt();  
int a[] = new int[n];  
int b[] = new int[n];  
for(int i=0;i<n;i++)  
{
a[i] = s.nextInt();  
}
for(int i=0;i<n;i++)  
{
b[i] = s.nextInt();  
}
System.out.println(UserMainCode.sumCommonElements(a, b));  
}
}
UserMainCode:  
public class UserMainCode {  
public static int sumCommonElements(int a[],int b[]){  
int sum = 0 ;  
for(int i=0;i<a.length;i++)  
{
for(int j=0;j<b.length;j++){  
if(a[i]==b[j])  
sum = sum + a[i];}  
}
if(sum==0)  
return -1;  
else return sum;  
}
}
5
8. Middle of Array  
Write a program to read an integer array and return the middle element in the array. The size  
of the array would always be odd. Include a class UserMainCode with a static method  
getMiddleElement which accepts a single integer array. The return type (integer) should be  
the middle element in the array. Create a Class Main which would be used to accept Input  
array and call the static method present in UserMainCode. Input and Output Format: Input  
consists of n+1 integers. The first integer corresponds to n, the number of elements in the  
array. The next 'n' integers correspond to the elements in the array. Output consists of a single  
Integer value. Refer sample output for formatting specifications.  
Assume that the maximum number of elements in the array is 19.  
Sample Input 1:  
5
1
5
2
6
9
3
4
Sample Output 1:  
2
3
Main:  
import java.util.*;  
public class Main {  
private static Scanner s;  
public static void main(String[] args) {  
s = new Scanner(System.in);  
int n = s.nextInt();  
int[] a = new int[n];  
for(int i=0;i<n;i++){  
a[i] = s.nextInt();  
}
System.out.println(UserMainCode.getMiddleElement(a));  
}
}
UserMainCode:  
public class UserMainCode {  
public static int getMiddleElement(int a[]){  
int n = a.length;  
return a[n/2];  
}
}
5
9. Simple String Manipulation  
Write a program to read a string and return a modified string based on the following rules.  
Return the String without the first 2 chars except when  
. keep the first char if it is 'j' 2. keep the second char if it is 'b'.  
1
Include a class UserMainCode with a static method getString which accepts a string. The  
return type (string) should be the modified string based on the above rules. Consider all  
letters in the input to be small case. Create a Class Main which would be used to accept Input  
string and call the static method present in UserMainCode. Input and Output Format: Input  
consists of a string with maximum size of 100 characters. Output consists of a string. Refer  
sample output for formatting specifications.  
Sample Input 1:  
hello  
Sample Output 1:  
llo  
Sample Input 2:  
java  
Sample Output 2:  
Jva  
Main:  
import java.util.*;  
public class Main {  
private static Scanner s;  
public static void main(String[] args) {  
s = new Scanner(System.in);  
String s1 = s.next();  
System.out.println(UserMainCode.getString(s1));  
}
}
UserMainCode:  
public class UserMainCode {  
public static String getString(String s1){  
StringBuffer sb=new StringBuffer();  
char a=s1.charAt(0);  
char b=s1.charAt(1);  
if(a!='j'&& b!='b')  
sb.append(s1.substring(2));  
else if(a=='j' && b!='b')  
sb.append("j").append(s1.substring(2));  
else if(a!='j' && b=='b')  
sb.append(s1.substring(1));  
else  
sb.append(s1.substring(0));  
return sb.toString();  
}
}
6
0. Date Validation  
Write a program to read a string representing a date. The date can be in any of the three  
formats 1:dd-MM-yyyy 2: dd/MM/yyyy 3: dd.MM.yyyy If the date is valid, print valid else  
print invalid. Include a class UserMainCode with a static method getValidDate which accepts  
a string. The return type (integer) should be based on the validity of the date. Create a Class  
Main which would be used to accept Input string and call the static method present in  
UserMainCode. Input and Output Format: Input consists of a string. Output consists of a  
string. Refer sample output for formatting specifications.  
Sample Input 1:  
0
3.12.2013  
Sample Output 1:  
valid  
Sample Input 2:  
0
3$12$2013  
Sample Output 3:  
Invalid  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc = new Scanner(System.in);  
String s= sc.next();  
int b = UserMainCode.getvalues(s);  
if(b==1)  
System.out.println("Valid");  
else  
System.out.println("Invalid");  
}
}
UserMainCode:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.Date;  
public class UserMainCode {  
public static int getvalues(String s) {  
if(s.matches("[0-9]{2}[.]{1}[0-9]{2}[.]{1}[0-9]{4}"))  
{
SimpleDateFormat sdf=new SimpleDateFormat("dd.MM.yyyy");  
sdf.setLenient(false);  
try  
{
Date d1=sdf.parse(s);  
return 1;  
}
catch (ParseException e) {  
return -1;  
}
}
else if(s.matches("[0-9]{2}[/]{1}[0-9]{2}[/][0-9]{4}"))  
{
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
sdf.setLenient(false);  
try  
{
Date d1=sdf.parse(s);  
return 1;  
catch (ParseException e) {  
}
return -1;  
}
}
else if(s.matches("[0-9]{2}[-]{1}[0-9]{2}[-][0-9]{4}"))  
{
SimpleDateFormat sdf=new SimpleDateFormat("dd-MM-yyyy");  
sdf.setLenient(false);  
try  
{
Date d1=sdf.parse(s);  
return 1;  
}
catch (ParseException e) {  
return -1;  
}
}
else  
return -1;  
}
}
6
1. Boundary Average  
Given an int array as input, write a program to compute the average of the maximum and  
minimum element in the array. Include a class UserMainCode with a static method  
getBoundaryAverage” that accepts an integer array as argument and returns a float that  
“
corresponds to the average of the maximum and minimum element in the array. Create a  
class Main which would get the input array and call the static method getBoundaryAverage  
present in the UserMainCode. Input and Output Format: The first line of the input consists  
of an integer n, that corresponds to the size of the array. The next n lines consist of integers  
that correspond to the elements in the array. Assume that the maximum number of elements  
in the array is 10. Output consists of a single float value that corresponds to the average of  
the max and min element in the array.  
Sample Input :  
6
3
6
9
4
2
5
Sample Output:  
5
.5  
Main:  
import java.util.*;  
import java.util.Arrays;  
public class Main {  
public static void main(String[] args) {  
Scanner sc = new Scanner(System.in);  
int s = sc.nextInt();  
int a[] = new int[s];  
for (int i = 0; i < s; i++)  
a[i] = sc.nextInt();  
System.out.println(UserMainCode.getBoundaryAverage(a));  
}
}
UserMainCode  
import java.util.Arrays;  
public class UserMainCode {  
public static float getBoundaryAverage(int a[] ){  
Arrays.sort(a);  
int sum = a[0] + a[a.length - 1];  
float avg = (float) sum / 2;  
return avg;  
}
}
6
2. Count Vowels  
Given a string input, write a program to find the total number of vowels in the given string.  
Include a class UserMainCode with a static method “countVowels” that accepts a String  
argument and returns an int that corresponds to the total number of vowels in the given string.  
Create a class Main which would get the String as input and call the static method  
countVowels present in the UserMainCode. Input and Output Format: Input consists of a  
string. Output consists of an integer..  
Sample Input:  
avinash  
Sample Output:  
3
Main:  
import java.util.*;  
public class Main {  
private static Scanner s;  
public static void main(String[] args) {  
s = new Scanner(System.in);  
String s1= s.next();  
System.out.println(countVowels(s1));  
}
UserMainCode  
public class UserMainCode{  
public static int countVowels(String s1)  
{
String s2=s1.toLowerCase();  
String s3="aeiou";  
int count=0;  
for(int i=0;i<s2.length();i++)  
{
for(int j=0;j<s3.length();j++)  
{
if(s2.charAt(i)==s3.charAt(j))  
{
count++;  
}
}
}
return count;  
}
}
6
3. Month Name  
Given a date as a string input in the format dd-mm-yy, write a program to extract the month  
and to print the month name in upper case. Include a class UserMainCode with a static  
method “getMonthName” that accepts a String argument and returns a String that  
corresponds to the month name. Create a class Main which would get the String as input and  
call the static method getMonthName present in the UserMainCode. The month names are  
JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST,  
{
SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER} Input and Output Format: Input  
consists of a String. Output consists of a String.  
Sample Input:  
0
1-06-82  
Sample Output:  
JUNE  
Main:  
import java.text.ParseException;  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) throws ParseException {  
Scanner sc=new Scanner(System.in);  
String s1=sc.nextLine();  
System.out.println(UserMainCode.calculateBornDay(s1));  
sc.close();  
}
}
UserMainCode:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.Date;  
public class UserMainCode {  
public static String calculateBornDay(String s1) throws ParseException  
{
SimpleDateFormat sdf=new SimpleDateFormat("dd-MM-yy");  
SimpleDateFormat sdf1=new SimpleDateFormat("MMMM");  
Date d=sdf.parse(s1);  
String s=sdf1.format(d);  
return s.toUpperCase();  
}
}
6
4. Reverse SubString  
Given a string, startIndex and length, write a program to extract the substring from right to  
left. Assume the last character has index 0. Include a class UserMainCode with a static  
method “reverseSubstring” that accepts 3 arguments and returns a string. The 1st argument  
corresponds to the string, the second argument corresponds to the startIndex and the third  
argument corresponds to the length. Create a class Main which would get a String and 2  
integers as input and call the static method reverseSubstring present in the UserMainCode.  
Input and Output Format: The first line of the input consists of a string. The second line of  
the input consists of an integer that corresponds to the startIndex. The third line of the input  
consists of an integer that corresponds to the length of the substring.  
Sample Input:  
rajasthan  
2
3
Sample Output:  
hts  
Main:  
import java.util.*;  
public class Main {  
private static Scanner s;  
public static void main(String[] args) {  
s =new Scanner(System.in);  
String input1= s.next();  
int input2=s.nextInt();int input3=s.nextInt();  
System.out.println(UserMainCode.retrieveString(input1,input2,input3));  
}
}
UserMainCode  
class UserMainCode {  
public static String retrieveString(String input1, int input2, int input3) {  
StringBuffer sb=new StringBuffer(input1);  
sb.reverse();  
String output=sb.substring(input2, input2+input3);  
return output;  
}
}
65. String Finder  
Given three strings say Searchstring, Str1 and Str2 as input, write a program to find out if Str2  
comes after Str1 in the Searchstring.  
Include a class UserMainCode with a static method “stringFinder” that accepts 3 String  
arguments and returns an integer. The 3 arguments correspond to SearchString, Str1 and Str2.  
The function returns 1 if Str2 appears after Str1 in the Searchtring. Else it returns 2.  
Create a class Main which would get 3 Strings as input and call the static  
method stringFinder present in the UserMainCode.  
Input and Output Format:  
Input consists of 3 strings.  
The first input corresponds to the SearchString.  
The second input corresponds to Str1.  
The third input corresponds to Str2.  
Output consists of a string that is either “yes” or “no”  
Sample Input 1:  
geniousRajKumarDev  
Sample Output 1:  
Yes  
Raj  
Dev  
Sample Input 2:  
Sample Output 2:  
geniousRajKumarDev  
No  
Dev  
Raj  
USERMAINCODE:  
public class UserMainCode {  
public static int stringFinder(String s1,String s2,String s3)  
{
String a1=s1.toLowerCase();  
String a2=s2.toLowerCase();  
String a3=s3.toLowerCase();  
if(a1.contains(a2)&&a1.contains(a3))  
{
if(a1.indexOf(a2)<a1.indexOf(a3))  
{
return 1;  
}
else  
return 2;  
}
return 0;  
}}  
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
String s2=s.next();  
String s3=s.next();  
int b=UserMainCode.stringFinder(s1, s2, s3);  
if(b==1)  
{
System.out.println("yes");  
}
else  
System.out.println("No");  
s.close();  
}
}
66. Phone Number Validator  
Given a phone number as a string input, write a program to verify whether the phone number  
is valid using the following business rules:  
-
-
-
It should contain only numbers or dashes (-)  
Dashes may appear at any position  
Should have exactly 10 digits  
Include a class UserMainCode with a static method “validatePhoneNumber” that accepts a  
String input and returns an integer. The method returns 1 if the phone number is valid. Else  
it returns 2.  
Create a class Main which would get a String as input and call the static method  
validatePhoneNumber present in the UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string that is either 'Valid' or 'Invalid'  
Sample Input 1:  
65-265-7777  
Sample Input 2:  
65-65-7777  
Sample Output 1:  
Valid  
Sample Output 2:  
Invalid  
2
2
USERMAINCODE:  
public class UserMainCode {  
public static int validatePhoneNumber(String s1)  
{
String s2 = s1.replaceAll("-", "");  
if (s2.matches("[0-9]{10}"))  
{
return 1;  
}
else  
return 2;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
int b=UserMainCode.validatePhoneNumber(s1);  
if(b==1)  
{
System.out.println("Valid");  
}
else  
System.out.println("Invalid");  
s.close();  
}
}
67. Month : Number of Days  
Given two inputs year and month (Month is coded as: Jan=0, Feb=1 ,Mar=2 ...), write a  
program to find out total number of days in the given month for the given year. Include a  
class  
UserMainCode with a static method “getNumberOfDays” that  
accepts 2 integers as arguments and returns an integer. The first argument corresponds to  
the year and the second argument corresponds to the month code. The method returns an  
integer corresponding to the number of days in the month.  
Create a class Main which would get 2 integers as input and call the static method  
getNumberOfDays present in the UserMainCode.  
Input and Output Format:  
Input consists of 2 integers that correspond to the year and month code. Output consists of  
an integer that corresponds to the number of days in the month in the given year.  
Sample Input:  
Sample Output:  
29  
2
1
000  
USERMAINCODE:  
import java.util.Calendar;  
public class UserMainCode {  
public static int getNumberOfDays(int y,int c)  
{
Calendar cal=Calendar.getInstance();  
cal.set(Calendar.YEAR, y);  
cal.set(Calendar.MONTH, c);  
int day=cal.getActualMaximum(Calendar.DAY_OF_MONTH);  
return day;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int y=s.nextInt();  
int c=s.nextInt();  
System.out.println(UserMainCode.getNumberOfDays(y, c));  
s.close();  
}
}
68. Negative String  
Given a string input, write a program to replace every appearance of the word "is" by "is  
not".  
If the word "is" is immediately preceded or followed by a letter no change should be made  
to the string .  
Include a class UserMainCode with a static method “negativeString” that accepts a String  
arguement and returns a String.  
Create a class Main which would get a String as input and call the static method  
negativeString present in the UserMainCode.  
Input and Output Format:  
Input consists of a String.  
Output consists of a String.  
Sample Input 1:  
Sample Output 1:  
This is just a misconception  
This is not just a misconception  
Sample Input 2:  
Sample Output 2:  
Today is misty  
Today is not misty  
USERMAINCODE:  
public class UserMainCode {  
public static String negativeString(String s1)  
{
String str=s1.replace(" is ", " is not ");  
return str;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
System.out.println(UserMainCode.negativeString(s1));  
s.close();  
}
}
69. Validate Number  
Given a negative number as string input, write a program to validate the number and to print  
the corresponding positive number.  
Include a class UserMainCode with a static method “validateNumber” that accepts a string  
argument and returns a string. If the argument string contains a valid negative number, the  
method returns the corresponding positive number as a string. Else the method returns -1.  
Create a class Main which would get a String as input and call the static method  
validateNumber present in the UserMainCode.  
Input and Output Format:  
Input consists of a String.  
Output consists of a String.  
Sample Input 1:  
94923  
Sample Input 2:  
6t  
Sample Output 1:  
94923  
Sample Output 2:  
-1  
-
-
USERMAINCODE:  
public class UserMainCode {  
public static String validateNumber(String s1)  
{
String ss="-1";  
if (s1.matches("[-]{1}[0-9]{1,}"))  
{
String st=s1.replace("-","");  
return st;  
}
else  
return ss;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
System.out.println(UserMainCode.validateNumber(s1));  
s.close();  
}
}
70. Digits  
Write a program to read a non-negative integer n that returns the count of the occurances of  
as digit.  
7
Include a class UserMainCode with a static method countSeven which accepts the integer  
value. The return type is integer which is the count value.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a integer.  
Output consists of integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
17  
Sample Input 2:  
534  
Sample Output 1:  
2
Sample Output 2:  
7
4
0
USERMAINCODE:  
public class UserMainCode {  
public static int countSeven(int n)  
{
int rem,sum=0;  
while(n>0)  
{
rem=n%10;  
if(rem==7)  
{
sum++;  
}
n=n/10;  
}
return sum;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
System.out.println(UserMainCode.countSeven(n));  
s.close();  
}
}
71. String Processing – III  
Write a program to read a string where all the lowercase 'x' chars have been moved to the  
end of the string.  
Include a class UserMainCode with a static method moveX which accepts the string. The  
return type is the modified string.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
xxhixx  
Sample Output 1:  
hixxxx  
Sample Input 2:  
XXxxtest  
Sample Output 2:  
XXtestxx  
USERMAINCODE:  
public class UserMainCode {  
public static String moveX(String s1)  
{
String s2="";  
String s3="";  
for(int i=0;i<s1.length();i++)  
{
char c=s1.charAt(i);  
if(c=='x')  
{
s2=s2+s1.charAt(i);  
}
else  
{
s3=s3+s1.charAt(i)  
}
}
String st=s3.concat(s2);  
return st;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
System.out.println(UserMainCode.moveX(s1));  
s.close();  
}
}
72. String Processing – IV  
Write a program to read a string and also a number N. Form a new string starting with  
stcharacter and with every Nth character of the given string. Ex - if N is 3, use chars 1, 3, 6,...  
1
and so on to form the new String. Assume N>=1.  
Include a class UserMainCode with a static method getStringUsingNthCharacter which  
accepts the string and the number n. The return type is the string as per the problem  
statement.  
Create a Class Main which would be used to accept the string and integer and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string and integer.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Sample Output 1:  
HelloWorld  
HelWrd  
USERMAINCODE:  
public class UserMainCode {  
public static String getStringUsingNthCharacter(String s1,int n)  
{
StringBuffer sb=new StringBuffer();  
sb.append(s1.charAt(0));  
for(int i=n-1;i<s1.length();i+=n)  
{
sb.append(s1.charAt(i));  
}
return sb.toString();  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
int n=s.nextInt();  
System.out.println(UserMainCode.getStringUsingNthCharacter(s1, n));  
s.close();  
}
}
7
3. Digit Comparison  
Write a program to read two integers and return true if they have the same last digit.  
Include a class UserMainCode with a static method compareLastDigit which accepts two  
integers and returns boolean. (true / false)  
Create a Class Main which would be used to accept two integers and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of two integer.  
Output consists TRUE / FALSE.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
2
9
9
Sample Output 1:  
TRUE  
UserMainCode  
public class UserMainCode {  
public static boolean compareLastDigit(int c,int d)  
{
int c1=c%10;  
int d1=d%10;  
boolean b=false;  
if(c1==d1)  
{
b=true;  
}
return b;  
}
}
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int c=s.nextInt();  
int d=s.nextInt();  
boolean res=UserMainCode.compareLastDigit(c,d);  
if(res==true)  
{
System.out.println("TRUE");  
}
else  
{
System.out.println("FALSE");  
}
s.close();  
}
}
7
4. Duplicates  
GIven three integers (a,b,c) find the sum. However, if one of the values is the same as  
another, both the numbers do not count towards the sum and the third number is returned  
as the sum.  
Include a class UserMainCode with a static method getDistinctSum which accepts three  
integers and returns integer.  
Create a Class Main which would be used to accept three integers and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of three integers.  
Output consists of a integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
2
1
Sample Output 1:  
2
Sample Input 2:  
1
2
3
Sample Output 2:  
6
UserMainCode:  
public class UserMainCode {  
public static int getDistinctSum(int a,int b,int c)  
{
int sum;  
if(a==b)  
{
sum=c;  
}
else if(b==c)  
{
sum=a;  
}
else if(c==a)  
{
sum=b;  
}
else  
{
sum=a+b+c;  
}
return sum;  
}
}
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int a=s.nextInt();  
int b=s.nextInt();  
int c=s.nextInt();  
int sum=UserMainCode.getDistinctSum(a, b, c);  
System.out.println(sum);  
s.close();  
}
}
7
5. String Processing - MixMania  
Write a program to read a string and check if it starts with '_ix' where '_' is any one char(a-z,  
A-Z, 0-9).  
If specified pattern is found return true else false.  
Include a class UserMainCode with a static method checkPattern which accepts the string.  
The return type is TRUE / FALSE.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE / FALSE.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Mix Mania  
Sample Output 1:  
TRUE  
UserMainCode  
public class UserMainCode {  
public static boolean checkPattern(String str)  
{
String str1=str.substring(0,3);  
int a=0,b=0,c=0;  
char c1=str1.charAt(0);  
char c2=str1.charAt(1);  
char c3=str1.charAt(2);  
boolean b1=false;  
if(Character.isDigit(c1)||Character.isLetter(c1))  
{
a=1;  
}
if(c2=='i')  
{
b=1;  
}
if(c3=='x')  
{
c=1;  
}
if(a==1&&b==1&&c==1)  
{
b1=true;  
}
return b1;  
}
}
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String str=s.nextLine();  
boolean b2=UserMainCode.checkPattern(str);  
if(b2==true)  
{
System.out.println("TRUE");  
}
else  
{
System.out.println("FALSE");  
}
s.close();  
}
}
7
6. String Processing  
Write a program to read a string and return a new string where the first and last chars have  
been interchanged.  
Include a class UserMainCode with a static method exchangeCharacters which accepts  
the  
string. The return type is the modified string.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
HelloWorld  
Sample Output 1:  
delloWorlH  
UserMainCode  
public class UserMainCode {  
public static String exchangeCharacters(String s1)  
{
String s2=s1.substring(1,s1.length()-1);  
StringBuffer sb=new StringBuffer();  
char c1=s1.charAt(0);  
char c2=s1.charAt(s1.length()-1);  
sb.append(c2).append(s2).append(c1);  
return sb.toString();  
}
}
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
System.out.println(UserMainCode.exchangeCharacters(s1));  
s.close();  
}
}
7
7. Regular Expression - II  
Given a string (s) apply the following rules.  
1
2
. String consists of three characters only.  
. The characters should be alphabets only.  
If all the conditions are satisifed then print TRUE else print FALSE.  
Include a class UserMainCode with a static method validateString which accepts the  
string.  
The return type is the boolean formed based on rules.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE or FALSE .  
Refer sample output for formatting specifications.  
Sample Input 1:  
AcB  
Sample Output 1:  
TRUE  
Sample Input 2:  
A2B  
Sample Output 2:  
FALSE  
UserMainCode:  
public class UserMainCode {  
public static boolean validateString(String s1)  
{
boolean b=false;  
if(s1.length()==3)  
{
if(s1.matches("[a-zA-z]{3}"))  
{
b=true;  
}
}
return b;  
}
}
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
boolean b1=userMainCode.validateString(s1);  
if(b1==true)  
{
System.out.println("TRUE");  
}
else  
{
System.out.println("FALSE");  
}
s.close();  
}
}
7
8. Strings Processing - Replication  
Write a program to read a string and also a number N. Return the replica of original string  
for n given time.  
Include a class UserMainCode with a static method repeatString which accepts the the  
string and the number n. The return type is the string based on the problem statement.  
Create a Class Main which would be used to accept the string and integer and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string and integer.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Lily  
2
Sample Output 1:  
LilyLily  
UserMainCode:  
public class UserMainCode {  
public static String repeatString(String s1,int n)  
{
StringBuffer sb=new StringBuffer();  
for(int i=0;i<n;i++)  
{
}
sb.append(s1);  
return sb.toString();  
}
}
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
int n=s.nextInt();  
System.out.println(UserMainCode.repeatString(s1, n));  
s.close();  
}
}
7
9. SumOdd  
Write a program to read an integer and find the sum of all odd numbers from 1 to the given  
number. [inclusive of the given number]  
if N = 9 [ 1,3,5,7,9]. Sum = 25  
Include a class UserMainCode with a static method addOddNumbers which accepts the  
number n. The return type is the integer based on the problem statement.  
Create a Class Main which would be used to accept the integer and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a integer.  
Output consists of a integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
6
Sample Output 1:  
9
UserMainCode:  
public class UserMainCode {  
public static int addOddNumbers(int n)  
{
int sum=0;  
for(int i=1;i<=n;i+=2)  
{
sum=sum+i;  
}
return sum;  
}
}
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
System.out.println(UserMainCode.addOddNumbers(n));  
s.close();  
}
}
8
0. String Processing - V  
Write a program to read a string array, concatenate the array elements one by one  
separated by comma and return the final string as output.  
Include a class UserMainCode with a static method concatString which accepts the string  
array. The return type is the string.  
Create a Class Main which would be used to accept the string array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of an integer n which is the number of elements followed by n string values.  
Output consists of the string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
AAA  
BBB  
CCC  
Sample Output 1:  
AAA,BBB,CCC  
UserMainCode:  
public class UserMainCode {  
public static String concatString(int n,String[] s1)  
{
StringBuffer sb=new StringBuffer();  
for(int i=0;i<s1.length;i++)  
{
sb.append(s1[i]).append(",");  
}
String s2=sb.toString();  
String s3=s2.substring(0,s2.length()-1);  
return s3;  
}
}
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
String s1[]=new String[n];  
for(int i=0;i<n;i++)  
{
s1[i]=s.next();  
}
System.out.println(UserMainCode.concatString(n, s1));  
s.close();  
}
}
8
1.Unique Number  
GIven three integers (a,b,c) , Write a program that returns the number of unique integers  
among the three.  
Include a class UserMainCode with a static method calculateUnique which accepts three  
integers and returns the count as integer.  
Create a Class Main which would be used to accept three integers and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of three integers.  
Output consists of a integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
4
3
2
Sample Output 1:  
3
Sample Input 2:  
4
-
4
4
Sample Output 2:  
2
Main:  
import java.util.*;  
public class Main {  
public static void main(String[]args){  
Scanner s=new Scanner(System.in);  
int a=s.nextInt();  
int b=s.nextInt();  
int c=s.nextInt();  
System.out.println(UserMainCode.calculateUnique(a, b, c));  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static int calculateUnique(int a,int b,int c)  
{
int d=0;  
if(a!=b&&a!=c&&b!=c)  
{
d=3;  
}
else if(a==b&&a==c&&b==c)  
{
d=1;  
}
else if((a!=b&&a==c&&b==c) || (a!=b&&a!=c&&b==c))  
{
d=2;  
}
else if((a==b&&a!=c&&b==c) || (a==b&&a!=c&&b!=c))  
{
d=2;  
}
else if((a==b&&a==c&&b!=c) || (a!=b&&a==c&&b!=c))  
{
d=2;  
}
return d;  
}}  
8
2. Math Calculator  
Write a program that accepts three inputs, first two inputs are operands in int form and  
third one being one of the following five operators: +, -, *, /, %. Implement calculator logic  
and return the result of the given inputs as per the operator provided. In case of division,  
Assume the result would be integer.  
Include a class UserMainCode with a static method calculator which accepts two integers,  
one operand and returns the integer.  
Create a Class Main which would be used to accept three integers and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of two integers and a character.  
Output consists of a integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
2
2
*
3
Sample Output 1:  
4
6
Main:  
import java.util.*;  
public class Main {  
public static void main(String[]args){  
Scanner s=new Scanner(System.in);  
int a=s.nextInt();  
int b=s.nextInt();  
char c = s.next().trim().charAt(0);  
System.out.println(UserMainCode.calculator(a, b, c));  
s.close();  
}}  
UserMainCode:  
public class UserMainCode {  
public static int calculator(int a,int b,char c)  
{
int a1=0;  
if(c=='*')  
{
a1=a*b;  
}
else if(c=='+')  
{
a1=a+b;  
}
else if(c=='-')  
{
a1=a-b;  
}
else if(c=='/')  
{
a1=a/b;  
}
else if(c=='%')  
{
a1=a%b;  
}
return a1;  
}}  
8
3. Scores  
Write a program to read a integer array of scores, if 100 appears at two consecutive  
locations return true else return false.  
Include a class UserMainCode with a static method checkScores which accepts the  
integer  
array. The return type is boolean.  
Create a Class Main which would be used to accept the integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of an integer n which is the number of elements followed by n integer values.  
Output consists of a string that is either 'TRUE' or 'FALSE'.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
1
1
00  
00  
1
Sample Output 1:  
TRUE  
Sample Input 2:  
3
1
1
1
00  
00  
Sample Output 2:  
FALSE  
Main:  
import java.util.*;  
public class Main {  
public static void main (String[] args)  
{
Scanner sc = new Scanner(System.in);  
int n = sc.nextInt();  
int[] arr = new int[n];  
for(int i=0;i<n;i++){  
arr[i] = sc.nextInt();  
}
System.out.println(UserMainCode.checkScores(arr, n));  
sc.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static boolean checkScores(int arr[], int n){  
boolean b = false;  
for(int i=0;i<n-1;i++){  
if(arr[i] == 100){  
if(arr[i+1] == 100){  
b = true;  
break;  
}
}
}
return b;  
}
}
8
4. ArrayFront  
Write a program to read a integer array and return true if one of the first 4 elements in the  
array is 9 else return false.  
Note: The array length may be less than 4.  
Include a class UserMainCode with a static method scanArray which accepts the integer  
array. The return type is true / false.  
Create a Class Main which would be used to accept the integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of an integer n which is the number of elements followed by n integer values.  
Output consists of TRUE / FALSE.  
Refer sample output for formatting specifications.  
Sample Input 1:  
6
1
2
3
4
5
6
Sample Output 1:  
FALSE  
Sample Input 2:  
3
1
2
9
Sample Output 2:  
TRUE  
Main:  
import java.util.*;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
int s=sc.nextInt();  
int []a=new int[s];  
for(int i=0;i<s;i++)  
{
a[i]=sc.nextInt();  
}
if(UserMainCode.scanArray(a)==true)  
System.out.println("TRUE");  
else  
System.out.println("FALSE");  
sc.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static boolean scanArray(int[] a)  
{
int u=0,l=0;  
boolean b=false;  
if(a.length>=4)  
l=4;  
else  
l=a.length;  
for(int i=0;i<l;i++)  
if(a[i]==9)  
u=10;  
if(u==10)  
b=true;  
return b;  
}
}
8
5. Word Count  
Given a string array (s) and non negative integer (n) and return the number of elements in  
the array which have same number of characters as the givent int N.  
Include a class UserMainCode with a static method countWord which accepts the string  
array and integer. The return type is the string formed based on rules.  
Create a Class Main which would be used to accept the string and integer and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a an integer indicating the number of elements in the string array followed  
the elements and ended by the non-negative integer (N).  
Output consists of a integer .  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
a
bb  
b
ccc  
1
Sample Output 1:  
2
Sample Input 2:  
5
dog  
cat  
monkey  
bear  
fox  
3
Sample Output 2:  
3
Main:  
import java.util.*;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
String[] str=new String[n];  
for(int i=0;i<n;i++)  
{
str[i]=sc.next();  
}
int c=sc.nextInt();  
System.out.println(UserMainCode.countWord(n,str,c));  
sc.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static int countWord(int n,String str[],int c)  
{
int count=0;  
for(int i=0;i<str.length;i++)  
{
if(str[i].length()==c)  
{
count++;  
}
}
return count;  
}
}
8
6. Find Distance  
Write a Program that accepts four int inputs(x1,y1,x2,y2) as the coordinates of two points.  
Calculate the distance between the two points using the below formula.  
Formula : square root of((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2))  
Then, Round the result to return an int  
Include a class UserMainCode with a static method findDistance which accepts four  
integers. The return type is integer representing the formula.  
Create a Class Main which would be used to accept the input integers and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of four integers.  
Output consists of a single integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
4
5
2
Sample Output 1:  
3
Sample Input 2:  
3
1
5
2
Sample Output 2:  
2
Main:  
import java.util.*;  
public class Main {  
public static void main (String[] args)  
{
Scanner s=new Scanner(System.in);  
int a=s.nextInt();  
int b=s.nextInt();  
int c=s.nextInt();  
int d=s.nextInt();  
System.out.println(UserMainCode.findDistance(a,b,c,d));  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static int findDistance(int a,int b,int c,int d) {  
long q=(int)Math.round(Math.sqrt(((a-c)*(a-c))+((b-d)*(b-d))));  
return (int) q;  
}
}
8
7. Word Count - II  
Write a program to read a string and count the number of words present in it.  
Include a class UserMainCode with a static method countWord which accepts the string.  
The return type is the integer giving out the count of words.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Today is Sunday  
Sample Output 1:  
3
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
UserMainCode.countWord(s1);  
s.close();  
}
}
UserMainCode:  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static void countWord(String s1){  
StringTokenizer st=new StringTokenizer(s1," ");  
int n=st.countTokens();  
System.out.println(n);  
}
}
8
8. Sum of Max & Min  
Write a Program that accepts three integers, and returns the sum of maximum and  
minimum numbers.  
Include a class UserMainCode with a static method getSumMaxMin which accepts three  
integers. The return type is integer representing the formula.  
Create a Class Main which would be used to accept the input integers and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of three integers.  
Output consists of a single integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
1
1
2
7
9
Sample Output 1:  
3
1
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int a=s.nextInt();  
int b=s.nextInt();  
int c=s.nextInt();  
System.out.println(UserMainCode.getSumMaxMin(a,b,c));  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static int getSumMaxMin(int a,int b,int c)  
{
int d=0;  
if(a<b&&b<c)  
{
d=a+c;  
}
else if(a<b&&b>c)  
{
d=b+c;  
}
else if(a>b&&b<c)  
{
d=a+b;  
}
return d;  
}}  
8
9. Decimal to Binary Conversion  
Write a Program that accepts a decimal number n, and converts the number to binary.  
Include a class UserMainCode with a static method convertDecimalToBinary which  
accepts  
an integer. The return type is long representing the binary number.  
Create a Class Main which would be used to accept the input integer and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of single integer.  
Output consists of a single long.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
Sample Output 1:  
1
01  
MAIN  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
System.out.println(UserMainCode.convertDecimalToBinary(n));  
s.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static long convertDecimalToBinary(int n){  
String s1=Integer.toBinaryString(n);  
long y=Long.parseLong(s1);  
return y;  
}
}
9
0.String Processing - V  
Write a program to read a string and also a number N. Form a new string made up of n  
repetitions of the last n characters of the String. You may assume that n is between 1 and  
the length of the string.  
Include a class UserMainCode with a static method returnLastRepeatedCharacters  
which  
accepts the string and the number n. The return type is the string as per the problem  
statement.  
Create a Class Main which would be used to accept the string and integer and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string and integer.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Hello  
2
Sample Output 1:  
lolo  
Sample Input 2:  
Hello  
3
Sample Output 2:  
Llollollo  
MAIN  
import java.util.Scanner;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
int n1=s.nextInt();  
System.out.println(UserMainCode.returnLastRepeatedCharacters(s1,n1));  
s.close();  
}
}
USERMAINCODE  
public class UserMainCode{  
public static String returnLastRepeatedCharacters(String s1, int n1)  
{
StringBuffer sb = new StringBuffer();  
for(int i = 0 ; i < n1 ; i++)  
sb.append(s1.substring(s1.length()-n1, s1.length()));  
return sb.toString();  
}
}
9
1.Regular Expression - III  
Given a string (s) apply the following rules.  
. String should not begin with a number.  
1
If the condition is satisifed then print TRUE else print FALSE.  
Include a class UserMainCode with a static method validateString which accepts the  
string.  
The return type is the boolean formed based on rules.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE or FALSE .  
Refer sample output for formatting specifications.  
Sample Input 1:  
ab2  
Sample Output 1:  
TRUE  
Sample Input 2:  
7
2CAB  
Sample Output 2:  
FALSE  
MAIN  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
if(UserMainCode.validateString(s1)==true)  
System.out.println("TRUE");  
else System.out.println("FALSE");  
s.close();  
}
}
USERMAINCODE  
public class UserMainCode {  
public static boolean validateString(String s)  
{
boolean b=false;  
if(s.charAt(0)=='0'||s.charAt(0)=='1'||s.charAt(0)=='2'||s.charAt(0)=='3'||  
s.charAt(0)=='4'||s.charAt(0)=='5'||s.charAt(0)=='6'||s.charAt(0)=='7'||s.charAt(0  
)
=='8'||s.charAt(0)=='9'){  
b=false;  
}
else  
b=true;  
return b;  
}
}
9
2.String Processing - TrimCat  
Write a program to read a string and return a new string which is made of every alternate  
characters starting with the first character. For example NewYork will generate Nwok, and  
Samurai will generate Smri.  
Include a class UserMainCode with a static method getAlternateChars which accepts the  
string. The return type is the modified string.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Hello  
Sample Output 1:  
Hlo  
MAIN  
import java.util.Scanner;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
System.out.println(UserMainCode.getAlternateChars(s1));  
s.close();  
}
}
USERMAINCODE  
public class UserMainCode{  
public static String getAlternateChars(String s)  
{
/
/String s1=s.replaceAll(“ “, “”);  
StringBuffer sbf = new StringBuffer();  
for(int i = 0; i < s.length() ; i=i+2)  
{
sbf.append(s.charAt(i));  
}
String str = sbf.toString();  
return str;  
}
}
9
3. String Processing - Username  
Write a program to read a valid email id and extract the username.  
Note - user name is the string appearing before @ symbol.  
Include a class UserMainCode with a static method fetchUserName which accepts the  
string. The return type is the modified string.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
admin@xyz.com  
Sample Output 1:  
admin  
MAIN CLASS  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
System.out.println(UserMainCode.fetchUserName(s1));;  
s.close();  
}
}
USERMAINCODE  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static String fetchUserName(String s1) {  
StringTokenizer st=new StringTokenizer(s1,"@");  
String s2=st.nextToken();  
return(s2);  
}
}
9
4. String Processing - VII  
Write a program to read a two strings and one int value(N). check if Nth character of first  
String from start and Nth character of second String from end are same or not. If both are  
same return true else return false.  
Check need not be Case sensitive  
Include a class UserMainCode with a static method isEqual which accepts the two strings  
and a integer n. The return type is the TRUE / FALSE.  
Create a Class Main which would be used to read the strings and integer and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of two strings and an integer.  
Output consists of TRUE / FALSE .  
Refer sample output for formatting specifications.  
Sample Input 1:  
AAAA  
abab  
2
Sample Output 1:  
TRUE  
Sample Input 2:  
MNOP  
QRST  
3
Sample Output 2:  
FALSE  
MAIN  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String s2=s.nextLine();  
int n=s.nextInt();  
boolean output=UserMainCode.isEqual(s1,s2,n);  
System.out.println(output);  
s.close();  
}
}
USERMAINCODE  
public class UserMainCode {  
public static boolean isEqual(String s1,String s2,int n){  
boolean a=false;  
if(n<s1.length()&&n<s2.length())  
{
char c=s1.charAt(n);  
char d=s2.charAt(s2.length()-n);  
String s3=Character.toString(c);  
/
/System.out.println(s3);  
String s4=Character.toString(d);  
/System.out.println(s4);  
/
if(s3.equalsIgnoreCase(s4))  
{
a=true;  
}
else  
{
a=false;  
}
}
return a;  
}
}
9
5. Largest Difference  
Write a program to read a integer array, find the largest difference between adjacent  
elements and display the index of largest difference.  
EXAMPLE:  
input1: {2,4,5,1,9,3,8}  
output1: 4 (here largest difference 9-1=8 then return index of 9 ie,4)  
Include a class UserMainCode with a static method checkDifference which accepts the  
integer array. The return type is integer.  
Create a Class Main which would be used to accept the integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of an integer n which is the number of elements followed by n integer values.  
Output consists of integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
7
2
4
5
1
9
3
8
Sample Output 1:  
4
MAIN CLASS  
import java.util.Scanner;  
public class Main{  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int m=s.nextInt();  
int[] n1=new int[m];  
for(int i=0;i<m;i++){  
n1[i]=s.nextInt();  
}
System.out.println(UserMainCode.checkDifference(n1));  
s.close();  
}
}
USERMAIN CODE  
public class UserMainCode {  
public static int checkDifference(int[] n1){  
int n2,n3=0,n4=0,i;  
for(i=0;i<n1.length-1;i++){  
n2=Math.abs(n1[i]-n1[i+1]);  
if(n2>n3){  
n3=n2;  
n4=i+1; }}  
return n4;  
}
}
1
.Start Case  
Write a program to read a sentence in string variable and convert the first letter of each  
word to capital case. Print the final string.  
Note: - Only the first letter in each word should be in capital case in final string.  
Include a class UserMainCode with a static method printCapitalized which accepts a  
string.  
The return type (String) should return the capitalized string.  
Create a Class Main which would be used to accept a string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a strings.  
Output consists of a String (capitalized string).  
Refer sample output for formatting specifications.  
Sample Input:  
Now is the time to act!  
Sample Output:  
Now Is The Time To Act!  
MAIN CLASS  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args){  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
System.out.println(UserMainCode.printCapitalized(s1));  
s.close();  
}
}
USERMAIN CODE  
import java.util.StringTokenizer;  
public class UserMainCode{  
public static String printCapitalized(String s1){  
StringBuffer sb=new StringBuffer();  
StringTokenizer t=new StringTokenizer(s1," ");  
while(t.hasMoreTokens()){  
String s2=t.nextToken();  
String s3=s2.substring(0,1);  
String s4=s2.substring(1, s2.length());  
sb.append(s3.toUpperCase()).append(s4).append(" "); }  
return sb.toString();  
}
}
2
. Maximum Difference  
Write a program to read an integer array and find the index of larger number of the two  
adjacent numbers with largest difference. Print the index.  
Include a class UserMainCode with a static method findMaxDistance which accepts an  
integer array and the number of elements in the array. The return type (Integer) should  
return index.  
Create a Class Main which would be used to accept an integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of n+1 integers, where n corresponds the size of the array followed by n  
integers. Output consists of an Integer (index).  
Refer sample output for formatting specifications.  
Sample Input :  
6
4
8
6
1
9
4
Sample Output :  
4
[
In the sequence 4 8 6 1 9 4 the maximum distance is 8 (between 1 and 9). The function  
should return the index of the greatest of two. In this case it is 9 (which is at index 4). output  
4.]  
=
Main:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
int a[]=new int[20];  
for(int i=0;i<n;i++)  
{
a[i]=s.nextInt();  
}
int max=UserMainCode.findMaxDistance(a);  
System.out.println(max);  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
static int findMaxDistance(int[] a)  
{
int max=0,index=0;  
for(int i=0;i<19;i++)  
{
int d=Math.abs(a[i]-a[i+1]);  
if(d>max)  
{
max=d;  
if(a[i]>a[i+1])  
{
index=i;  
}
else  
{
index=i+1;  
}
}
}
return index;  
}
}
3
. Palindrome - In Range  
Write a program to input two integers, which corresponds to the lower limit and upper limit  
respectively, and find the sum of all palindrome numbers present in the range including the  
two numbers. Print the sum.  
Include a class UserMainCode with a static method addPalindromes which accepts two  
integers. The return type (Integer) should return the sum if the palindromes are present,  
else return 0.  
Create a Class Main which would be used to accept two integer and call the static method  
present in UserMainCode.  
Note1 : A palindrome number is a number which remains same after reversing its digits.  
Note2 : A single digit number is not considered as palindrome.  
Input and Output Format:  
Input consists of 2 integers, which corresponds to the lower limit and upper limit  
respectively.  
Output consists of an Integer (sum of palindromes).  
Refer sample output for formatting specifications.  
Sample Input :  
1
1
30  
50  
Sample Output :  
72  
131+141 = 272)  
2
(
Main:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n1=s.nextInt();  
int n2=s.nextInt();  
System.out.println(UserMainCode.addPalindromes(n1,n2));  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static int addPalindromes(int n1,int n2){  
int sum=0;  
for(int i=n1;i<=n2;i++){  
int r=0,n3=i;  
while(n3!=0){  
r=(r*10)+(n3%10);  
n3=n3/10;  
}
if(r==i)  
sum=sum+i;  
}
return sum;  
}
}
4
. PAN Card  
Write a program to read a string and validate PAN no. against following rules:  
1
2
. There must be eight characters.  
. First three letters must be alphabets followed by four digit number and ends with  
alphabet  
. All alphabets should be in capital case.  
3
Print “Valid” if the PAN no. is valid, else print “Invalid”.  
Include a class UserMainCode with a static method validatePAN which accepts a string.  
The  
return type (Integer) should return 1 if the string is a valid PAN no. else return 2.  
Create a Class Main which would be used to accept a string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string, which corresponds to the PAN number.  
Output consists of a string - "Valid" or "Invalid"  
Refer sample output for formatting specifications.  
Sample Input 1:  
ALD3245E  
Sample Output 1:  
Valid  
Sample Input 2:  
OLE124F  
Sample Output 2:  
Invalid  
Main:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
UserMainCode.validatePAN(s1);  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {public static void validatePAN(String s1) {  
if(s1.matches("[A-Z]{3}[0-9]{4}[A-Z]{1}"))  
{
System.out.println("Valid");  
}
else  
System.out.println("Invalid");  
}
}
5
. Fibonacci Sum  
Write a program to read an integer n, generate fibonacci series and calculate the sum of  
first n numbers in the series. Print the sum.  
Include a class UserMainCode with a static method getSumOfNfibos which accepts an  
integer n. The return type (Integer) should return the sum of n fibonacci numbers.  
Create a Class Main which would be used to accept an integer and call the static method  
present in UserMainCode.  
Note: First two numbers in a Fibonacci series are 0, 1 and all other subsequent numbers are  
sum of its previous two numbers. Example - 0, 1, 1, 2, 3, 5...  
Input and Output Format:  
Input consists of an integer, which corresponds to n.  
Output consists of an Integer (sum of fibonacci numbers).  
Refer sample output for formatting specifications.  
Sample Input :  
5
Sample Output :  
7
[0 + 1 + 1 + 2 + 3 = 7]  
Main:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
System.out.println(UserMainCode.getSumOfNfibos(n));  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static int getSumOfNfibos(int n){  
int a=-1,b=1,c=0,d=0;  
for(int i=0;i<n;i++)  
{
c=a+b;  
d=d+c;  
a=b;  
b=c;  
}
return d;  
}
}
6
.Test Vowels  
Write a program to read a string and check if given string contains exactly five vowels in any  
order. Print “Yes” if the condition satisfies, else print “No”.  
Assume there is no repetition of any vowel in the given string and all characters are  
lowercase.  
Include a class UserMainCode with a static method testVowels which accepts a string.  
The  
return type (Integer) should return 1 if all vowels are present, else return 2.  
Create a Class Main which would be used to accept a string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string (“Yes” or “No”).  
Refer sample output for formatting specifications.  
Sample Input 1:  
acbisouzze  
Sample Output 1:  
Yes  
Sample Input 2:  
cbisouzze  
Sample Output 2:  
No  
Main:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
int b=UserMainCode.testVowels(s1);  
if(b==1)  
System.out.println("Yes");  
else  
System.out.println("No");  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static int testVowels(String s1) {  
int b;  
int n1=0,n2=0,n3=0,n4=0,n5=0;  
String s2=s1.toLowerCase();  
for(int i=0;i<s2.length();i++){  
char c=s2.charAt(i);  
if(c=='a')  
n1++;  
if(c=='e')  
n2++;  
if(c=='i')  
n3++;  
if(c=='o')  
n4++;  
if(c=='u')  
n5++;}  
if(n1==1&&n2==1&n3==1&&n4==1&&n5==1)  
b=1;  
else b=2;  
return b;  
}
}
7
.Dash Check  
Write a program to read two strings and check whether or not they have dashes in the same  
places. Print “Yes” if the condition satisfies, else print “No”. Include a class UserMainCode  
with a static method compareDashes which accepts two  
strings. The return type (Integer) should return 1 if all dashes are placed correctly, else  
return 2.  
Create a Class Main which would be used to accept two strings and call the static method  
present in UserMainCode.  
Note: The strings must have exactly the same number of dashes in exactly the same  
positions. The strings might be of different length.  
Input and Output Format:  
Input consists of two strings.  
Output consists of a string (“Yes” or “No”).  
Refer sample output for formatting specifications.  
Sample Input 1:  
hi—there-you.  
1
2--(134)-7539  
Sample Output 1:  
Yes  
Sample Input 2:  
-
-
15-389  
xyw-zzy  
Sample Output 2:  
No  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String s2=s.nextLine();  
int p=UserMainCode.compareDashes(s1,s2);  
if(p==1)  
System.out.println("Yes");  
else  
System.out.println("No");  
s.close();  
}
}
import java.util.ArrayList;  
public class UserMainCode {  
public static int compareDashes(String s1, String s2) {  
ArrayList<Integer>l1=new ArrayList<Integer>();  
for(int i=0;i<s1.length();i++)  
{
if(s1.charAt(i)=='-')  
{
l1.add(i);  
}
}
ArrayList<Integer>l2=new ArrayList<Integer>();  
for(int i=0;i<s2.length();i++)  
{
if(s2.charAt(i)=='-')  
{
l2.add(i);  
}
}
//System.out.println(l1);  
/System.out.println(l2);  
/
if(l1.equals(l2))  
{
return 1;  
}
else  
return 2;  
}
}
8
.Reverse Split  
Write a program to read a string and a character, and reverse the string and convert it in a  
format such that each character is separated by the given character. Print the final string.  
Include a class UserMainCode with a static method reshape which accepts a string and a  
character. The return type (String) should return the final string.  
Create a Class Main which would be used to accept a string and a character, and call the  
static method present in UserMainCode.  
Input and Output Format:  
Input consists of a string and a character.  
Output consists of a string (the final string).  
Refer sample output for formatting specifications.  
Sample Input:  
Rabbit  
-
Sample Output:  
t-i-b-b-a-R  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String s2=s.next();  
System.out.println(UserMainCode.reShape(s1,s2));  
s.close();  
}
}
public class UserMainCode {  
public static String reShape(String s,String s1){  
StringBuffer sb=new StringBuffer(s);  
StringBuffer sb2=new StringBuffer();  
String s2=sb.reverse().toString();  
for(int i=0;i<s2.length();i++)  
{
sb2.append(s2.charAt(i));  
sb2.append(s1);  
}
sb2.deleteCharAt(sb2.length()-1);  
/
/System.out.println(sb2.toString());  
return sb2.toString();  
}
}
9
.Remove 10's  
Write a program to read an integer array and remove all 10s from the array, shift the other  
elements towards left and fill the trailing empty positions by 0 so that the modified array is  
of the same length of the given array.  
Include a class UserMainCode with a static method removeTens which accepts the  
number  
of elements and an integer array. The return type (Integer array) should return the final  
array.  
Create a Class Main which would be used to read the number of elements and the input  
array, and call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of n+1 integers, where n corresponds to size of the array followed by n  
elements of the array.  
Output consists of an integer array (the final array).  
Refer sample output for formatting specifications.  
Sample Input :  
5
1
1
2
1
2
0
0
0
Sample Output :  
1
2
0
import java.io.*;  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc = new Scanner(System.in);  
int i;  
int n = sc.nextInt();  
int a[] = new int[n];  
for (i = 0; i < n; i++) {  
a[i] = sc.nextInt();  
}
UserMainCode.removeTens(a);  
sc.close();  
}
}
import java.util.*;  
public class UserMainCode {  
public static void removeTens(int a[]){  
Scanner sc = new Scanner(System.in);  
int i,k = 0;  
int b[] = new int[a.length];  
ArrayList<Integer> al = new ArrayList<Integer>();  
for (i = 0; i <a.length; i++) {  
if (a[i] != 10) {  
al.add(a[i]);  
}
}
if (al.size() < a.length) {  
k = a.length- al.size();  
for (i = 0; i < k; i++) {  
al.add(0);  
}
}
int b1[] = new int[a.length];  
for (i = 0; i < a.length; i++) {  
b1[i] = al.get(i);  
System.out.println(b1[i]);  
}
}
}
1
0.Last Letters  
Write a program to read a sentence as a string and store only the last letter of each  
word of  
the sentence in capital letters separated by $. Print the final string.  
Include a class UserMainCode with a static method getLastLetter which accepts a  
string.  
The return type (string) should return the final string.  
Create a Class Main which would be used to read a string, and call the static method  
present  
in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string (the final string).  
Refer sample output for formatting specifications.  
Smaple Input :  
This is a cat  
Sample Output :  
S$S$A$T  
Main:  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String input=s.nextLine();  
System.out.println(UserMainCode.getLastLetter(input));  
}
}
UserMainCode:  
import java.util.*;  
public class UserMainCode {  
public static String getLastLetter(String input){  
String str1=null;  
StringTokenizer st=new StringTokenizer(input," ");  
StringBuffer sb=new StringBuffer();  
while(st.hasMoreTokens()){  
str1=st.nextToken();  
/
// String str2=Character.toString(str1.charAt(str1.length()-  
1
));  
String str2=str1.substring(str1.length()-1);  
String str3= str2.toUpperCase();  
sb.append(str3).append("$");  
}
sb.deleteCharAt(sb.length()-1);  
return sb.toString();  
}
}
1
1.Largest Key in HashMap  
Write a program that construts a hashmap and returns the value corresponding to the  
largest key.  
Include a class UserMainCode with a static method getMaxKeyValue which accepts a  
string.  
The return type (String) should be the value corresponding to the largest key.  
Create a Class Main which would be used to accept Input string and call the static  
method  
present in UserMainCode.  
Input and Output Format:  
Input consists of 2n+1 values. The first value corresponds to size of the hashmap. The  
next n  
pair of numbers equals the integer key and value as string.  
Output consists of a string which is the value of largest key.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
1
2
amron  
9
Exide  
7
SF  
Sample Output 1:  
Amron  
Main:  
import java.util.*;  
public class Main {  
**  
@param args  
/
*
*/  
public static void main(String[] args) {  
/ TODO Auto-generated method stub  
/
HashMap<Integer, String>hm=new HashMap<Integer, String>();  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
for(int i=0;i<n;i++)  
{
int a=s.nextInt();  
String s1=s.next();  
hm.put(a,s1);  
}
System.out.println(UserMainode.getMaxKeyValue(hm));  
}
}
Hashmap:  
import java.util.*;  
import java.util.HashMap;  
import java.util.Iterator;  
public class UserMainode {  
public static String getMaxKeyValue(HashMap<Integer, String> hm) {  
int max=0;  
String s3=null;  
Iterator<Integer>itr=hm.keySet().iterator();  
while(itr.hasNext())  
{
int b=itr.next();  
if(b>max)  
{
max=b;  
s3=hm.get(b);  
}
}
return (s3);  
}
}
1
2.All Numbers  
Write a program to read a string array and return 1 if all the elements of the array are  
numbers, else return -1.  
Include a class UserMainCode with a static method validateNumber which accepts a  
string  
aray. The return type (integer) should be -1 or 1 based on the above rules.  
Create a Class Main which would be used to accept Input string array and call the static  
method present in UserMainCode.  
The string array is said to be valid if all the elements in the array are numbers. Else it is  
invalid.  
Input and Output Format:  
Input consists of an integer specifying the size of string array followed by n strings.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
1
2
2
23  
4.5  
3
one  
Sample Output 1:  
invalid  
Sample Input 2:  
2
1
2
23  
4.5  
Sample Output 2:  
valid  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s = new Scanner(System.in);  
int n = s.nextInt();  
String[] s1 = new String[n];  
for(int i=0;i<n;i++){  
s1[i] = s.next();  
}
int out=(userMainCode.validateNumber(s1));  
System.out.println(out);  
}
}
UserMainCode:  
class userMainCode{  
public static int validateNumber(String[] s1){  
int b =0 ,count,out=0;  
for(int i=0;i<s1.length;i++){  
String s2 = s1[i];  
if(s2.matches("[0-9.]{1,}"))  
{
count =0;  
for(int j=0;j<s2.length();j++)  
{
char c = s2.charAt(j);  
if(c=='.')  
count++;  
}
if(count>1)  
b=1;  
}
else  
b=1;  
}
if(b==0){  
out=1;  
}
else out=-1;  
return out;  
}
}
1
3.Day of the Week  
Write a program to read a date as string (MM-dd-yyyy) and return the day of week on  
that  
date.  
Include a class UserMainCode with a static method getDay which accepts the string.  
The  
return type (string) should be the day of the week.  
Create a Class Main which would be used to accept Input string and call the static  
method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
0
7-13-2012  
Main:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.Date;  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)throws ParseException {  
Scanner sc=new Scanner(System.in);  
String s1=sc.nextLine();  
System.out.println(UserMainCode.getDay(s1));  
}
/
/ TODO Auto-generated method stub  
}
UserMainCode:  
import java.text.SimpleDateFormat;  
import java.text.ParseException;  
import java.util.Date;  
public class UserMainCode {  
public static String getDay(String s1) throws ParseException  
{
SimpleDateFormat sdf=new SimpleDateFormat("MM-dd-yyyy");  
SimpleDateFormat sdf1=new SimpleDateFormat("EEEEE");  
Date d=sdf.parse(s1);  
String s=sdf1.format(d);  
return s;  
}
}
1
4.Max Substring  
Write a program to accept two string inputs. The first being a source string and second  
one  
a delimiter. The source string contains the delimiter at various locations. Your job is to  
return the substring with maximum number of characters. If two or more substrings  
have  
maximim number of characters return the substring which appears first. The size of the  
delimiter is 1.  
Include a class UserMainCode with a static method extractMax which accepts the  
string.  
The return type (string) should be the max substring.  
Create a Class Main which would be used to accept Input string and call the static  
method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a source string and delimiter.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
delhi-pune-patna  
-
Sample Output 1:  
Delhi\  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args){  
Scanner sc=new Scanner(System.in);  
String input1=sc.next();  
String input2=sc.next();  
System.out.println(UserMainCode.extractMax(input1,input2));  
}
}
Usermaincode:  
import java.util.StringTokenizer;  
import java.util.*;  
public class UserMainCode {  
public static String extractMax(String input1,String input2){  
int max=0;  
String s3=null;  
StringTokenizer st=new StringTokenizer(input1,"-");  
while( st.hasMoreTokens())  
{
String s2=st.nextToken();  
int n=s2.length();  
if(n>max)  
{
max=n;  
s3=s2;  
}
}
return(s3);  
}
}
1
5.States and Capitals  
Write a program that construts a hashmap with “state” as key and “capital” as its value.  
If  
the next input is a state, then it should return capital$state in lowercase.  
Include a class UserMainCode with a static method getCapital which accepts a  
hashmap.  
The return type is the string as given in the above statement  
Create a Class Main which would be used to accept Input string and call the static  
method  
present in UserMainCode.  
Input and Output Format:  
Input consists of 2n+2 values. The first value corresponds to size of the hashmap. The  
next n  
pair of numbers contains the state and capital. The last value consists of the “state”  
input.  
Output consists of a string as mentioned in the problem statement.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
Karnataka  
Bangaluru  
Punjab  
Chandigarh  
Gujarat  
Gandhinagar  
Punjab  
Sample Output 1:  
chandigarh$punjab  
Main:  
import java.util.HashMap;  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
HashMap<String,String> hm=new  
HashMap<String,String>();  
for(int i=0;i<n;i++)  
{
String s1=sc.next();  
String s2=sc.next();  
hm.put(s1,s2);  
}
String sa=sc.next();  
System.out.print(UserMainCode.getCapital(hm,sa));  
}
}
UserMainCode:  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.Map;  
public class UserMainCode {  
public static String getCapital(HashMap<String,String>  
hm,String sa)  
{
String chan=null;  
Iterator<String>it=hm.keySet().iterator();  
StringBuffer sb=new StringBuffer();  
while(it.hasNext()){  
String a=it.next();  
if(a.equals(sa))  
{
chan=hm.get(a);  
sb.append(chan).append("$").append(sa);  
}
}
return sb.toString();  
}
}
1
6.Simple String Manipulation - II  
Write a program to read a string and return an integer based on the following rules.  
If the first word and the last word in the String match, then return the number of  
characters  
in the word else return sum of the characters in both words. Assume the Strings to be  
case -  
sensitive.  
Include a class UserMainCode with a static method calculateWordSum which accepts  
a
string. The return type (integer) should be based on the above rules.  
Create a Class Main which would be used to accept Input string and call the static  
method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string with maximum size of 100 characters.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
COGNIZANT TECHNOLOGY SOLUTIONS COGNIZANT  
Sample Output 1:  
9
Sample Input 2:  
HOW ARE YOU  
Sample Output 2:  
6
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String inpList=sc.nextLine();  
System.out.println(UserMainCode.calculateWordSum(inpList));  
}
}
UserMainCode:  
import java.util.*;  
public class UserMainCode {  
public static int calculateWordSum(String inp) {  
int count=0;  
String st[]=inp.split(" ");  
String s1=st[0];  
String slst=st[st.length-1];  
if(s1.equals(slst))  
{
count=s1.length();  
}
else  
{
count=s1.length()+slst.length();  
}
return count;  
}
}
1
7.Vowels, Arrays & ArrayLists  
Write a program to read an array of strings and return an arraylist which consists of  
words  
whose both first and last characters are vowels. Assume all inputs are in lowecase.  
Include a class UserMainCode with a static method matchCharacter which accepts a  
string  
array. The return type shoud be an arraylist which should contain elements as  
mentioned  
above.  
Create a Class Main which would be used to accept Input array and call the static  
method  
present in UserMainCode.  
Input and Output Format:  
Input consists of n+1 integers. The first integer corresponds to n, the number of  
elements in  
the array. The next 'n' string correspond to the elements in the array.  
Output consists of strings which are elements of arraylist  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
abcde  
pqrs  
abci  
orto  
Sample Output 1:  
abcde  
abci  
orto  
Main:  
package vowels;  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
int n;  
Scanner sc=new Scanner(System.in);  
n=Integer.parseInt(sc.nextLine());  
String[] str=new String[n];  
for(int i=0;i<n;i++)  
{
str[i]=sc.nextLine();  
}
ArrayList<String> arr=new ArrayList<String>();  
arr=UserMainCode.matchCharacter(str);  
Iterator<String> it=arr.iterator();  
while(it.hasNext())  
{
System.out.println(it.next());  
}
}
}
Usermaincode:  
package vowels;  
import java.util.*;  
public class UserMainCode {  
public static ArrayList<String> matchCharacter (String[] ss)  
{
ArrayList<String> as=new ArrayList<String>();  
for(int i=0;i<ss.length;i++)  
{
String sp=ss[i];  
char[] mp=sp.toLowerCase().toCharArray();  
if((mp[0]=='a'||mp[0]=='e'||mp[0]=='i'||mp[0]=='o'||mp[0]=='u')&  
&
1
(mp[sp.length()-  
]=='a'||mp[sp.length()-1]=='e'||mp[sp.length()-  
]=='i'||mp[sp.length()-  
1
1
]=='o'||mp[sp.length()-1]=='u'))  
{
as.add(sp);  
}
}
return as;  
}
}
1
8.Transfer from Hashmap to Arraylist  
Write a program that constructs a hashmap with “employee id” as key and “name” as its  
value. Based on the rules below, on being satisfied, the name must be added to the  
arraylist.  
i)First character should be small and the last character should be Capital.  
ii)In name at least one digit should be there.  
Include a class UserMainCode with a static method getName which accepts a hashmap.  
The  
return type is an arraylist as expected in the above statement  
Create a Class Main which would be used to accept Input string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of 2n+1 values. The first value corresponds to size of the hashmap. The next n  
pair of numbers contains the employee id and name.  
Output consists of arraylist of strings as mentioned in the problem statement.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
1
ravi5raJ  
2
sita8gitA  
3
ram8sitA  
4
rahul  
Sample Output 1:  
ravi5raJ  
sita8gitA  
ram8sitA  
main:  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) {  
HashMap<Integer,String> hm1=new HashMap<Integer,String>();  
int n;  
Scanner sc=new Scanner(System.in);  
n=Integer.parseInt(sc.nextLine());  
for(int i=0;i<n;i++)  
{
hm1.put(Integer.parseInt(sc.nextLine()),sc.nextLine());  
}
ArrayList<String> al1=new ArrayList<String>();  
al1=UserMainCode.getName(hm1);  
Iterator<String> it=al1.iterator();  
while(it.hasNext())  
{
System.out.println(it.next());  
}
}
}
Usermaincode:  
import java.util.*;  
import java.text.*;  
public class UserMainCode {  
public static ArrayList<String> getName(HashMap<Integer,String> hm1)  
{
ArrayList<String> al2=new ArrayList<String>();  
Iterator<Integer> it =hm1.keySet().iterator();  
while(it.hasNext())  
{
int id=it.next();  
String name=hm1.get(id);  
if(name.matches("[a-z]{1,}.*[0-9]{1,}.*[A-Z]{1}"))  
al2.add(name);  
}
return al2;  
}
}
1
9.Max Admissions  
Write a program that reads details about number of admissions per year of a particular  
college, return the year which had maximum admissions. The details are stored in an  
arraylist with the first index being year and next being admissions count.  
Include a class UserMainCode with a static method getYear which accepts a arraylist. The  
return type is an integer indicating the year of max admissions.  
Create a Class Main which would be used to accept Input string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of 2n+1 values. The first value corresponds to size of the data (year &  
admissions). The next n pair of numbers contains the year and admissions count.  
Output consists of an integer as mentioned in the problem statement.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
2
2
2
3
2
4
2
2
010  
00000  
011  
00000  
012  
5000  
013  
5000  
Sample Output 1:  
2
011  
USERMAINCODE:  
import java.util.ArrayList;  
public class UserMainCode  
{
public static int year (ArrayList<Integer> a1)  
{
int max=0,pos=0;  
for(int i=1;i<a1.size();i+=2)  
{
if(a1.get(i)>max)  
{
max=a1.get(i);  
pos=i;  
}
}
return a1.get(pos-1);  
}
}
MAIN:  
import java.util.*;  
class Main  
{
public static void main(String [] args)  
{
Scanner s=new Scanner(System.in);  
ArrayList<Integer> a1=new ArrayList<Integer>();  
int n=s.nextInt();  
n=n*2;  
for(int i=0;i<n;i++)  
{
a1.add(s.nextInt());  
}
System.out.println(UserMainCode.year(a1));  
s.close();  
}
}
2
0.Sum Non Prime Numbers  
Write a program to calculate the sum of all the non prime positive numbers less than or  
equal to the given number.  
Note: prime is a natural number greater than 1 that has no positive divisors other than 1  
and itself  
Example:  
input = 9  
Prime numbers = 2,3,5 and 7  
output = 1+4+6+8+9=28  
Include a class UserMainCode with a static method “addNumbers” that accepts an  
integer  
arguement and returns an integer.  
Create a class Main which would get an integer as input and call the static  
method validateNumber present in the UserMainCode.  
Input and Output Format:  
Input consists of an integer.  
Output consists of an integer.  
Sample Input:  
9
Sample Output:  
2
8
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
{
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
System.out.println(UserMainCode.addNumbers(n));  
}
}
}
Usermaincode:  
public class UserMainCode {  
public static int addNumbers(int n) {  
int sum=0;int k=0;int sum1=0;  
for(int i=1; i<=n; i++)  
{
k=0;  
for(int j=1; j<=i; j++)  
{
if(i%j==0)  
k++;  
}
if(k!=2)  
{
sum=sum+i;  
}
}
return sum;  
}
}
2
1.Date Format Conversion  
Given a date string in the format dd/mm/yyyy, write a program to convert the given date to  
the format dd-mm-yy.  
Include a class UserMainCode with a static method “convertDateFormat” that accepts  
a
String and returns a String.  
Create a class Main which would get a String as input and call the static  
method convertDateFormat present in the UserMainCode.  
Input and Output Format:  
Input consists of a String.  
Output consists of a String.  
Sample Input:  
1
2/11/1998  
Sample Output:  
2-11-98  
1
Main:  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
UserMainCode.convertDateFormate(s1);  
}
}
Usermaincode:  
import java.util.*;  
import java.text.*;  
public class UserMainCode {  
public static void convertDateFormate(String s1) {  
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
sdf.setLenient(false);  
try {  
Date d1=sdf.parse(s1);  
SimpleDateFormat sdf1=new SimpleDateFormat("dd-MM-yy");  
String s2=sdf1.format(d1);  
System.out.println(s2);  
}
catch (ParseException e) {  
e.printStackTrace();  
}
}
}
2
2.Valid Date  
Given a date string as input, write a program to validate if the given date is in any of the  
following formats:  
dd.mm.yyyy  
dd/mm/yy  
dd-mm-yyyy  
Include a class UserMainCode with a static method “validateDate” that accepts a String  
and  
returns an integer. This method returns 1 if the date is valid, else return -1.  
Create a class Main which would get a String as input and call the static  
method validateDate present in the UserMainCode.  
Input and Output Format:  
Input consists of a String.  
Output consists of a String that is either 'Valid' or 'Invalid'.  
Sample Input 1:  
1
2.03.2012  
Sample Output 1:  
Valid  
Sample Input 2:  
2
7#01#1977  
Sample Output 2:  
Invalid  
UserMainCode:  
public class UserMainCode  
{
public static int dateformat(String s1) throws ParseException  
{
String s2=" ";  
int n=-1;  
if(s1.matches("[0-9]{2}[.]{1}[0-9]{2}[.]{1}[0-9]{4}"))  
{
SimpleDateFormat sdf=new SimpleDateFormat("dd.MM.yyyy");  
Date d=sdf.parse(s1);  
s2=sdf.format(d);  
n=1;  
}
else if(s1.matches("[0-9]{2}[/]{1}[0-9]{2}[/]{1}[0-9]{2}"))  
{
SimpleDateFormat sdf1=new SimpleDateFormat("dd/MM/yy");  
Date d1=sdf1.parse(s1);  
s2=sdf1.format(d1);  
n=1;  
}
else if(s1.matches("[0-9]{2}[-]{1}[0-9]{2}[-]{1}[0-9]{4}"))  
{
SimpleDateFormat sdf2=new SimpleDateFormat("dd-MM-yyyy");  
Date d2=sdf2.parse(s1);  
s2=sdf2.format(d2);  
n=1;  
}
else  
{
n=-1;  
}
return n;  
}
}
MAIN:  
import java.text.ParseException;  
import java.util.*;  
class Main  
{
public static void main(String [] args) throws ParseException  
{
Scanner s=new Scanner(System.in);  
String s1=s.next();  
int b=UserMainCode.dateformat(s1);  
if(b==1)  
{
System.out.println("Valid");  
}
Else  
{
System.out.println("Invalid");  
}
s.close();  
}
}
2
3.Convert Format  
Given a 10 digit positive number in the format XXX-XXX-XXXX as a string input, write a  
program to convert this number to the format XX-XX-XXX-XXX.  
Include a class UserMainCode with a static method “convertFormat” that accepts a  
String  
argument and returns a String.  
Create a class Main which would get a String as input and call the static  
method convertFormat present in the UserMainCode.  
Input and Output Format:  
Input consists of a String.  
Output consists of a String.  
Sample Input:  
5
55-666-1234  
Sample Output:  
5-56-661-234  
5
Main:  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String s=sc.next();  
System.out.println(UserMainCode.convertFormate(s));  
}
}
Usermaincode:  
import java.util.*;  
import java.text.*;  
public class UserMainCode {  
public static String convertFormate(String s) {  
StringTokenizer t=new StringTokenizer(s,"-");  
String s1=t.nextToken();  
String s2=t.nextToken();  
String s3=t.nextToken();  
StringBuffer sb=new StringBuffer();  
sb.append(s1.substring(0, s1.length()-1)).append('-');  
sb.append(s1.charAt(s1.length()-1)).append(s2.charAt(0)).append('-');  
sb.append(s2.substring(1, s2.length())).append(s3.charAt(0)).append('-');  
sb.append(s3.substring(1, s3.length()));  
return sb.toString();  
}
}
2
4.Add and Reverse  
Given an int array and a number as input, write a program to add all the elements in the  
array greater than the given number. Finally reverse the digits of the obtained sum and print  
it.  
Include a class UserMainCode with a static method “addAndReverse” that accepts 2  
arguments and returns an integer.The first argument corresponds to the integer array and  
the second argument corresponds to the number.  
Create a class Main which would get the required input and call the static  
method addAndReverse present in the UserMainCode.  
Example:  
Input Array = {10,15,20,25,30,100}  
Number = 15  
sum = 20 + 25 + 30 + 100 = 175  
output = 571  
Input and Output Format:  
The first line of the input consists of an integer that corresponds to the number of elements  
in the array.  
The next n lines of the input consists of integers that correspond to the elements in the  
array.  
The last line of the input consists of an integer that corresponds to the number.  
Output consists of a single integer.  
Sample Input  
6
1
1
2
2
3
1
1
0
5
0
5
0
00  
5
Sample Output  
5
71  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
int a[]=new int[n];  
for(int i=0;i<n;i++)  
{
a[i]=sc.nextInt();  
}
int b=sc.nextInt();  
System.out.println(UserMainCode.addAndReverse(n,b,a)) ;  
sc.close();  
}
}
Usermaincode:  
import java.util.*;  
public class UserMainCode {  
public static int addAndReverse(int n,int b,int a[])  
{
int i=0,sum=0,r=0;  
for(i=0;i<a.length;i++)  
{
if(a[i]>b)  
{
sum=sum+a[i];  
}
}
System.out.println(sum);  
while(sum!=0)  
{
r=((r*10)+(sum%10));  
sum=sum/10;  
}
return r;  
}
}
2
5.Next Year day  
Given a date string in dd/mm/yyyy format, write a program to calculate the day which falls  
on the same date next year. Print the output in small case.  
The days are sunday, monday, tuesday, wednesday, thursday, friday and saturday.  
Include a class UserMainCode with a static method “nextYearDay” that accepts a String  
and  
returns a String.  
Create a class Main which would get a String as input and call the static  
method nextYearDay present in the UserMainCode.  
Input and Output Format:  
Input consists of a String.  
Output consists of a String.  
Sample Input:  
1
3/07/2012  
Sample Output:  
Saturday  
Main:  
import java.util.*;  
import java.text.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String s1=sc.next();  
UserMainCode u=new UserMainCode();  
{
System.out.println(u.nextYearDay(s1));  
}
}
}
Usercodemain:  
import java.util.*;  
import java.text.*;  
public class UserMainCode  
{
public String nextYearDay(String s1)  
{
String s=null;  
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
sdf.setLenient(false);  
try {  
Date d1=sdf.parse(s1);  
Calendar cal=Calendar.getInstance();  
cal.setTime(d1);  
cal.add(Calendar.YEAR, 1);  
Date d2=cal.getTime();  
SimpleDateFormat sdf1=new SimpleDateFormat("EEEEE");  
s=sdf1.format(d2);  
}
catch (ParseException e)  
{
e.printStackTrace();  
}
return s;  
}
}
2
6.Sum Squares of Digits  
Write a program that accepts a positive number as input and calculates the sum of squares  
of individual digits of the given number.  
Include a class UserMainCode with a static method “getSumOfSquaresOfDigits” that  
accepts an integer argument and returns an integer.  
Create a class Main which would get an integer as input and call the static  
method getSumOfSquaresOfDigits present in the UserMainCode.  
Input and Output Format:  
Input consists of an integer.  
Output consists of an integer.  
Sample Input:  
3
21  
Sample Output:  
1
4
Main:-  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
UserMainCode.getSumOfSquaresOfDigits(n);  
s.close();  
}
}
UserMainCode:-  
import java.util.*;  
public class UserMainCode {  
public static void getSumOfSquaresOfDigits(int n) {  
int a=n;  
int rem=0;  
int sum=0;  
while(a!=0)  
{
rem=a%10;  
sum=sum+(rem*rem);  
a=a/10;  
}
System.out.println(sum);  
}
}
2
7.Even and Odd Index Sum  
Write a program that accepts a positive number as input and calculates the sum of digits at  
even indexes (say evenSum) and sum of digits at odd indexes (say oddSum) in the given  
number. If both the sums are equal , print 'yes', else print no.  
Example:  
input = 23050  
evenSum = 2 + 0 + 0 = 2  
oddSum = 3 + 5 = 8  
output = no  
Include a class UserMainCode with a static method “sumOfOddEvenPositioned” that  
accepts an integer and returns an integer. The method returns 1 if the 2 sums are equal.  
Else the method returns -1.  
Create a class Main which would get an integer as input and call the static  
method sumOfOddEvenPositioned present in the UserMainCode.  
Input and Output Format:  
Input consists of an integer.  
Output consists of a string that is either “yes” or “no”.  
Sample Input 1:  
2
3050  
Sample Output 1:  
no  
Sample Input 2:  
2
31  
Sample Output 2:  
Yes  
Main:-  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner sc = new Scanner(System.in);  
int n = sc.nextInt();  
UserMainCode.sumOfOddEvenPositioned(n);  
sc.close();  
}
}
UserMainCode:-  
import java.util.*;  
public class UserMainCode {  
public static void sumOfOddEvenPositioned(int n) {  
int rem = 0, i = 0;  
int a[] = new int[10];  
while (n > 0) {  
rem = n % 10;  
a[i] = rem;  
n = n / 10;  
i++;  
}
int sume = 0, sumo = 0;  
for (int j = i - 1; j >= 0; j--) {  
if(j%2!=0)  
{
sumo = sumo + a[j];  
}
else  
{
sume = sume + a[j];  
}
}
if (sume == sumo) {  
System.out.println("Yes");  
}
else  
System.out.println("No");  
}
}
2
8.Remove 3 Multiples  
Write a program that accepts an ArrayList of integers as input and removes every 3rd  
element and prints the final ArrayList.  
Suppose the given arrayList contains 10 elements remove the 3rd, 6th and 9th elements.  
Include a class UserMainCode with a static method “removeMultiplesOfThree” that  
accepts  
an ArrayList<Integer> as arguement and returns an ArrayList<Integer>.  
Create a class Main which would get the required input and call the static  
method removeMultiplesOfThree present in the UserMainCode.  
Input and Output Format:  
The first line of the input consists of an integer n, that corresponds to the number of  
elements to be added in the ArrayList.  
The next n lines consist of integers that correspond to the elements in the ArrayList.  
Output consists of an ArrayList of integers.  
Sample Input:  
6
3
1
1
1
1
1
1
9
7
9
Sample Output  
3
1
1
1
9
7
Main:-  
import java.util.ArrayList;  
import java.util.Iterator;  
import java.util.Scanner;  
public class Main{  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
ArrayList<Integer> al=new ArrayList<Integer>();  
ArrayList<Integer> al1=new ArrayList<Integer>();  
int n=Integer.parseInt(sc.nextLine());  
for(int i=0;i<n;i++)  
{
al.add(sc.nextInt());  
}
al1=UserMainCode.removeMultiplesOfThree(al);  
Iterator it=al1.iterator();  
while(it.hasNext())  
{
System.out.println(it.next());  
}
}
}
UserMainCode:-  
import java.util.ArrayList;  
import java.util.Iterator;  
import java.util.StringTokenizer;  
public class UserMainCode  
{
public static ArrayList<Integer> removeMultiplesOfThree(ArrayList<Integer> al)  
{
ArrayList<Integer> al2=new ArrayList<Integer>();  
for(int i=0;i<al.size();i++)  
{
if((i+1)%3!=0)  
al2.add(al.get(i));  
}
return al2;  
}
}
2
9.String Occurances - II  
Obtain two strings S1,S2 from user as input. Your program should count the number of  
times S2 appears in S1.  
Return the count as output. Note - Consider case.  
Include a class UserMainCode with a static method getSubstring which accepts two string  
variables. The return type is the count.  
Create a Class Main which would be used to accept two Input strings and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of two strings with maximum size of 100 characters.  
Output consists of an integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
catcowcat  
cat  
Sample Output 1:  
2
Sample Input 2:  
catcowcat  
CAT  
Sample Output 2:  
0
Main:-  
MAIN  
import java.util.Scanner;  
public class Main {  
public static void main(String[]args){  
Scanner sc=new Scanner(System.in);  
String s=sc.nextLine();  
String s1=sc.nextLine();  
System.out.println(UserMainCode.getSubstring(s, s1));  
sc.close();  
}
}
USERMAINCODE  
public class UserMainCode{  
public static int getSubstring(String s,String s1){  
int t=s1.length();  
int count=0;  
for(int i=0;i<s.length()-t+1;i++)  
{
String s3=s.substring(i,t+i);  
if(s3.equals(s1))  
{
count++;  
}
}
return count;  
}
}
3
0. Programming Logic  
Write a Program that accepts three integer values (a,b,c) and returns their sum. However, if  
one of the values is 13 then it does not count towards the sum and the next number also  
does not count. So for example, if b is 13, then both b and c do not count.  
Include a class UserMainCode with a static method getLuckySum which accepts three  
integers. The return type is integer representing the sum.  
Create a Class Main which would be used to accept the input integers and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of three integers.  
Output consists of a single integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
2
3
Sample Output 1:  
6
Sample Input 2:  
1
2
1
3
Sample Output 2:  
3
Sample Input 3:  
1
3
3
8
Sample Output 3:  
8
Main:-  
import java.util.Scanner;  
public class Main{  
public static void main(String[] args){  
Scanner s=new Scanner(System.in);  
int a=s.nextInt();  
int b=s.nextInt();  
int c=s.nextInt();  
System.out.println(UserMainCode.luckySum(a,b,c));  
}
}
UserMainCode:-  
public class UserMainCode{  
public static int luckySum(int a, int b, int c)  
{
if(a == 13)  
return 0;  
if(b == 13)  
return a;  
if(c == 13)  
return (a + b);  
return (a + b + c);  
}
}
3
1.Triplets  
Given an integer array, Write a program to find if the array has any triplets. A triplet is a  
value if it appears 3 consecutive times in the array.  
Include a class UserMainCode with a static method checkTripplets which accepts an  
integer  
array. The return type is boolean stating whether its a triplet or not.  
Create a Class Main which would be used to accept the input arrayand call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of n+1 integers. The first integer would represent the size of array and the  
next n integers would have the values.  
Output consists of a string stating TRUE or FALSE.  
Refer sample output for formatting specifications.  
Sample Input 1:  
7
3
3
5
5
5
2
3
Sample Output 1:  
TRUE  
Sample Input 2:  
7
5
3
5
1
5
2
3
Sample Output 2:  
FALSE  
Main:-  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
int n;  
Scanner sc=new Scanner(System.in);  
n=sc.nextInt();  
int[] a=new int[n];  
for(int i=0;i<n;i++)  
{
a[i]=sc.nextInt();  
}
boolean s=UserMainCode.checkTripplets(a);  
if(s==true)  
System.out.println("TRUE");  
else  
System.out.println("FALSE");  
}
}
UserMainCode:-  
import java.util.*;  
public class UserMainCode {  
public static boolean checkTripplets(int[] a)  
{
boolean b=false;  
for(int i=0;i<a.length-2;i++)  
{
if((a[i]==a[i+1])&&(a[i+1]==a[i+2]))  
{
b=true;  
}
}
return b;  
}
}
3
2.Repeat Front  
Given a string (s) and non negative integer (n) apply the following rules.  
1
2
. Display the first three characters as front.  
. If the length of the string is less than 3, then consider the entire string as front and  
repeat it n times.  
Include a class UserMainCode with a static method repeatFirstThreeCharacters which  
accepts the string and integer. The return type is the string formed based on rules.  
Create a Class Main which would be used to accept the string and integer and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string and integer.  
Output consists of a string .  
Refer sample output for formatting specifications.  
Sample Input 1:  
Coward  
2
Sample Output 1:  
CowCow  
Sample Input 2:  
So  
3
Sample Output 2:  
SoSoSo  
Main:-  
import java.util.*;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
String s=sc.nextLine();  
int n=Integer.parseInt(sc.nextLine());  
System.out.println(UserMainCode.repeatFirstThreeCharacters(s,n));  
sc.close();  
}
}
UserMaincode:-  
import java.util.*;  
public class UserMainCode  
{
public static String repeatFirstThreeCharacters(String s,int n)  
{
StringBuffer sb=new StringBuffer();  
StringBuffer sb1=new StringBuffer();  
if(s.length()>3)  
{
sb.append(s.substring(0,3));  
s=sb.toString();  
}
for(int i=0;i<n;i++)  
sb1.append(s);  
return sb1.toString();  
}
}
3
3.Sorted Array  
Write a program to read a string array, remove duplicate elements and sort the array.  
Note:  
1
. The check for duplicate elements must be case-sensitive. (AA and aa are NOT  
duplicates)  
. While sorting, words starting with upper case letters takes precedence.  
2
Include a class UserMainCode with a static method orderElements which accepts the  
string  
array. The return type is the sorted array.  
Create a Class Main which would be used to accept the string arrayand integer and call the  
static method present in UserMainCode.  
Input and Output Format:  
Input consists of an integer n which is the number of elements followed by n string values.  
Output consists of the elements of string array.  
Refer sample output for formatting specifications.  
Sample Input 1:  
6
AAA  
BBB  
AAA  
AAA  
CCC  
CCC  
Sample Output 1:  
AAA  
BBB  
CCC  
Sample Input 2:  
7
AAA  
BBB  
aaa  
AAA  
Abc  
A
b
Sample Output 2:  
A
AAA  
Abc  
BBB  
aaa  
b
Main:-  
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
int n;  
Scanner sin = new Scanner(System.in);  
n = sin.nextInt();  
String[] a1 = new String[n];  
for(int i=0;i<n;i++)  
{
a1[i] = sin.next();  
}
a1 = UserMainCode.orderElements(a1);  
for(int i=0;i<a1.length;i++)  
System.out.println(""+a1[i]);  
}
}
UserMainCode:-  
import java.util.*;  
public class UserMainCode  
{
public static String[] orderElements(String[] arr)  
{
HashSet<String> al=new HashSet<String>();  
for(int i=0;i<arr.length;i++)  
{
al.add(arr[i]);  
}
Iterator<String> itr=al.iterator();  
String ar[] = new String[al.size()];  
int i =0 ;  
while(itr.hasNext()){  
ar[i] = itr.next();  
i++;  
}
Arrays.sort(ar);  
return ar;  
}
}
3
4.Pattern Matcher  
Write a program to read a string and check if it complies to the pattern 'CPT-XXXXXX' where  
XXXXXX is a 6 digit number. If the pattern is followed, then print TRUE else print FALSE.  
Include a class UserMainCode with a static method CheckID which accepts the string. The  
return type is a boolean value.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output should print TRUE or FALSE .  
Refer sample output for formatting specifications.  
Sample Input 1:  
CPT-302020  
Sample Output 1:  
TRUE  
Sample Input 2:  
CPT123412  
Sample Output 2:  
FALSE  
Main:  
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
Scanner sc = new Scanner(System.in);  
String s = sc.next();  
System.out.println(UserMainCode.CheckID(s));  
sc.close();  
}
}
UserMainCode:  
public class UserMainCode  
{
public static boolean CheckID(String s)  
{
boolean b=false;  
if(s.matches("(CPT)[-]{1}[0-9]{6}"))  
{
b=true;  
}
else  
{
b=false;  
}
return b;  
}
}
3
5.Playing with String - I  
Given a string array and non negative integer (n) apply the following rules.  
1
2
3
. Pick nth character from each String element in the String array and form a new String.  
. If nth character not available in a particular String in the array consider $ as the character.  
. Return the newly formed string.  
Include a class UserMainCode with a static method formString which accepts the string  
and  
integer. The return type is the string formed based on rules.  
Create a Class Main which would be used to accept the string and integer and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a an integer which denotes the size of the array followed by the array of  
strings and an integer (n).  
Output consists of a string .  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
ABC  
XYZ  
EFG  
MN  
3
Sample Output 1:  
CZG$  
Main:  
import java.util.Scanner;  
public class Main  
{
public static void main(String[] arg)  
{
Scanner s=new Scanner(System.in);  
int n=Integer.parseInt(s.nextLine());  
String[] sc=new String[n];  
for(int i=0;i<n;i++)  
{
sc[i]=s.nextLine();  
}
int a=Integer.parseInt(s.nextLine());  
System.out.println(UserMainCode.formString(n,sc,a));  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static String formString(int n,String[] input,int a)  
{
StringBuffer sb=new StringBuffer();  
for(int i=0;i<n;i++)  
{
if(input[i].length()>=a)  
{
String a1=input[i];  
sb.append(a1.charAt(a-1));  
}
else  
{
sb.append('$');  
}
}
return sb.toString();  
}
}
3
6.Regular Expression - 1  
Given a string (s) apply the following rules.  
1
2
3
4
. String should be only four characters long.  
. First character can be an alphabet or digit.  
. Second character must be uppercase 'R'.  
. Third character must be a number between 0-9.  
If all the conditions are satisifed then print TRUE else print FALSE.  
Include a class UserMainCode with a static method validate which accepts the string. The  
return type is the boolean formed based on rules.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE or FALSE .  
Refer sample output for formatting specifications.  
Sample Input 1:  
vR4u  
Sample Output 1:  
TRUE  
Sample Input 2:  
vRau  
Sample Output 2:  
FALSE  
Sample Input 3:  
vrau  
Sample Output 3:  
FALSE  
S.36) import java.util.Scanner;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
String n=sc.nextLine();  
System.out.println(UserMainCode.validate(n));  
sc.close();  
}
}
public class UserMainCode  
{
public static String validate(String s)  
{
String w="FALSE";  
if(s.length()==4 &&  
(
=
Character.isDigit(s.charAt(0))||Character.isAlphabetic(s.charAt(0)))&&s.charAt(1)  
='R')  
{
if(Character.isDigit(s.charAt(2)))  
w="TRUE";  
}
return w;  
}
}
3
7.Regular Expression – 2 (Age Validator)  
Given the age of a person as string, validate the age based on the following rules.  
1
2
3
. Value should contain only numbers.  
. Value should be non-negative.  
. Value should be in the range of 21 to 45'.  
If all the conditions are satisifed then print TRUE else print FALSE.  
Include a class UserMainCode with a static method ValidateAge which accepts the string.  
The return type is the boolean formed based on rules.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE or FALSE .  
Refer sample output for formatting specifications.  
Sample Input 1:  
2
3
Sample Output 1:  
TRUE  
Sample Input 2:  
-
34  
Sample Output 2:  
FALSE  
Sample Input 3:  
3
a
Sample Output 3:  
FALSE  
AcB/TRUE  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[]args){  
Scanner s=new Scanner(System.in);  
//Regular Expression – 2  
(
Age Validator) pg.No:150  
String n=s.nextLine();  
boolean b=UserMainCode.ValidateAge(n);  
if(b==true)  
{
System.out.println("TRUE");  
}
else  
System.out.println("FALSE");  
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static boolean ValidateAge(String n)  
{
boolean b = false;  
if(n.matches("[0-9]{2}"))  
{
//Regular Expression – 2  
(
Age Validator) pg.No:150  
int a=Integer.parseInt(n);  
if(a>0&&a>=21&&a<=45)  
{
b=true;  
}
else  
b=false;  
}
return b;  
}
}
3
8. Regular Expression – 3 (Phone Validator)  
Given a phone number as string, validate the same based on the following rules.  
1
2
3
. Value should contain only numbers.  
. Value should contain 10 digits.  
. Value should not start with 00.  
If all the conditions are satisifed then print TRUE else print FALSE.  
Include a class UserMainCode with a static method validatePhone which accepts the  
string.  
The return type is the boolean formed based on rules.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE or FALSE .  
Refer sample output for formatting specifications.  
Sample Input 1:  
9
987684321  
Sample Output 1:  
TRUE  
Sample Input 2:  
0
014623452  
Sample Output 2:  
FALSE  
Main:  
import java.util.*;  
public class Main {  
public static void main(String[]args){  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
boolean b1=UserMainCode.validatePhone(s1);  
if(b1==true)  
{
//phone validation pg.no:151  
System.out.println("TRUE");  
}
else  
{
System.out.println("FALSE");  
}
s.close();  
}
}
UserMainCode:  
public class UserMainCode {  
public static boolean validatePhone(String s1)  
{
boolean b=false;  
if(s1.matches("[0]{1}[0]{1}[0-9]{8}") )  
{
b=false;  
}
/
/phone validation pg.no:151  
else  
{
b=true;  
}
return b;  
}
}
3
9.String Splitter  
Write a program which would accept a string and a character as a delimiter. Apply the  
below rules  
1
2
. Using the delimiter, split the string and store these elements in array.  
. Reverse each element of the string and convert it into lowercase.  
Include a class UserMainCode with a static method manipulateLiteral which accepts the  
string and character. The return type is the string array formed.  
Create a Class Main which would be used to accept the string and characterand call the  
static method present in UserMainCode.  
Input and Output Format:  
Input consists of a string and character.  
Output consists of a string array.  
Refer sample output for formatting specifications.  
Sample Input 1:  
AAA/bba/ccc/DDD  
/
Sample Output 1:  
aaa  
abb  
ccc  
ddd  
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s = new Scanner(System.in);  
String ip1=s.next();  
char ip2='/';  
String op[]=UserMainCode.manipulateLiteral(ip1,ip2);  
for(int i=0;i<op.length;i++)  
System.out.println(op[i]);  
s.close();  
}
}
import java.util.ArrayList;  
import java.util.StringTokenizer;  
public class UserMainCode  
{
public static String[] manipulateLiteral(String ip1, char ip2)  
{
StringTokenizer t1 = new StringTokenizer(ip1,"/");  
ArrayList<String> lst = new ArrayList<String>();  
while(t1.hasMoreTokens())  
{
StringBuffer sb = new StringBuffer();  
sb.append(t1.nextToken().toLowerCase());  
lst.add(sb.reverse().toString());  
}
String[] op = new String[lst.size()];  
for(int i = 0;i<lst.size();i++)  
{
op[i] = lst.get(i);  
}
return op;  
}
}
4
0.Vowel Count  
Write a program to read a string and count the number of vowels present in it.  
Include a class UserMainCode with a static method tellVowelCount which accepts the  
string. The return type is the integer giving out the count of vowels.  
Note: The check is case-insensitive.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
NewYork  
Sample Output 1:  
2
Sample Input 2:  
Elephant  
Sample Output 2:  
3
import java.util.*;  
public class Main  
{
public static void main(String[]args)  
// Second set: 40.Vowel  
Count//  
{
Scanner sc=new Scanner(System.in);  
String s=sc.nextLine();  
int max=UserMainCode.tellVowelCount(s);  
System.out.println(max);  
sc.close();  
}
}
public class UserMainCode {  
public static int tellVowelCount(String s)  
{
int max=0;  
int count=0;  
for(int i=0;i<s.length();i++)  
{
char c=s.charAt(i);  
if(c=='a'||c=='e'||c=='i'||c=='o'||c=='u'||c=='A'||c=='E'||c=='I'||  
c=='O'||c=='U')  
{
count++;  
}
}
if(count>max)  
{
max=count;  
}
return max;  
}
}
4
1.Playing with String - II  
Write a program to accept a string array as input, convert all the elements into lowercase  
and sort the string array. Display the sorted array.  
Include a class UserMainCode with a static method sortArray which accepts the string  
array.  
The return type is the string array formed based on requirement.  
Create a Class Main which would be used to accept the string array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a an integer which denotes the size of the array followed by the array of  
strings,  
Output consists of a string array.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
AAA  
BB  
CCCC  
A
ABCDE  
Sample Output 1:  
a
aaa  
abcde  
bb  
cccc  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
String s1[]=new String[n];  
String s2[]=new String[n];  
for(int i=0;i<n;i++)  
//S.41.Playing with  
String - II//  
{
s1[i]=s.next();  
}
s2=UserMainCode.sortArray(s1,n);  
for (int i = 0; i < n; i++) {  
System.out.println(s2[i]);  
}
s.close();  
}
}
import java.util.Arrays;  
public class UserMainCode  
{
public static String[] sortArray(String s1[],int n){  
String s2[]=new String[n];  
for (int i = 0; i < n; i++)  
{
s2[i]=s1[i].toLowerCase();  
}
Arrays.sort(s2);  
return s2;  
}
}
4
2.Median Calculation  
Write a program to accept an int array as input, and calculate the median of the same.  
Median Calculation Procedure:  
1
2
. Sort the sequence of numbers.  
. The total number count is odd, Median will be the middle number.  
The total number count is even, Median will be the average of two middle numbers, After  
calculating the average, round the number to nearest integer.  
Include a class UserMainCode with a static method calculateMedian which accepts the int  
array. The return type is the integer which would be the median.  
Create a Class Main which would be used to accept the integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a an integer which denotes the size of the array followed by the array of  
integers.  
Output consists of a integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
7
1
2
1
4
7
1
2
Sample Output 1:  
2
Sample Input 2:  
6
5
5
8
8
6
8
2
1
1
4
0
8
Sample Output 2:  
7
1
Main  
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
int n;  
Scanner sin = new Scanner(System.in);  
n = sin.nextInt();  
int[] a1 = new int[n];  
for(int i=0;i<n;i++)  
{
a1[i] = sin.nextInt();  
}
System.out.println(""+UserMainCode.calculateMedian(a1));  
sin.close();  
}
}
UserMainCode  
import java.util.Arrays;  
public class UserMainCode  
{
public static int calculateMedian(int[] a)  
{
Arrays.sort(a);  
int length = a.length;  
int result=0,mid=0,midNext=0;  
if((length%2) != 0)  
{
mid = (length/2)+1;  
result = a[mid];  
}
else  
{
mid = length/2;  
midNext = mid+1;  
float add = a[mid-1]+a[midNext-1];  
float div = add/2;  
result = Math.round(div);  
}
return result;  
}
}
4
3.Sequence in Array  
Write a program to accept an int array as input, and check if [1,2,3] appears somewhere in  
the same sequence.  
Include a class UserMainCode with a static method searchSequence which accepts the  
int  
array. The return type is a boolean which returns true or false.  
Create a Class Main which would be used to accept the integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a an integer which denotes the size of the array followed by the array of  
integers.  
Output should print true or false.  
Refer sample output for formatting specifications.  
Sample Input 1:  
9
1
1
-
2
5
1
2
3
4
5
6
Sample Output 1:  
TRUE  
Sample Input 2:  
6
-
2
5
1
3
2
6
Sample Output 2:  
FALSE  
Main  
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
int a[]=new int[n];  
for(int i=0;i<n;i++){  
a[i]=s.nextInt();  
}
System.out.println(UserMainCode.searchsequence(a));  
s.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static boolean searchsequence(int[] a)  
{
boolean b = false;  
for(int i = 0 ; i< a.length-3; i++)  
{
if(a[i]==1 && a[i+1]==2 && a[i+2]==3)  
b = true;  
}
return b;  
}
}
4
4.Asterisk & Characters  
Write a program to read a string and return true or false based on the below rule:  
. Return true if for every '*' in the string, there are same characters both side immediately  
1
before and after the star, else return false.  
Include a class UserMainCode with a static method scanStarNeighbors which accepts  
the  
string. The return type is the boolean TRUE or FALSE based on the rule.  
Note: The check is case-insensitive.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE or FALSE.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Hello*World  
Sample Output 1:  
FALSE  
Sample Input 2:  
Welcome*elizabeth  
Sample Output 2:  
TRUE  
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String input=s.next();  
System.out.println( UserMainCode. scanStarNeighbors (input));  
s.close();  
}
}
UserMainCode  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static boolean scanStarNeighbors (String input) {  
boolean b=false;  
StringTokenizer t=new StringTokenizer(input,"*");  
String s1=t.nextToken();  
String s2=t.nextToken();  
String s3=s1.substring(s1.length()-1);  
String s4=s2.substring(0,1);  
if(s3.equalsIgnoreCase(s4))  
b=true;  
return b;  
}
}
4
5.Occurance Count  
Write a program to read a string that contains a sentence and read a word. Check the  
number of occurances of that word in the sentence.  
Include a class UserMainCode with a static method countWords which accepts the two  
strings. The return type is the integer giving the count.  
Note: The check is case-sensitive.  
Create a Class Main which would be used to accept the two strings and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of two strings.  
Output consists of count indicating the number of occurances.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Hello world Java is best programming language in the world  
world  
Sample Output 1:  
2
Sample Input 2:  
hello world  
World  
Sample Output 2:  
0
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String s2=s.nextLine();  
int v=UserMainCode.countWords(s1,s2);  
System.out.println(v);  
s.close();  
}
}
UserMainCode  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static int countWords(String s1,String s2){  
StringTokenizer t=new StringTokenizer(s1," ");  
int c=0;  
while(t.hasMoreTokens())  
{
String s3=t.nextToken();  
if(s3.equals(s2))  
c++;  
}
return c;  
}
}
4
6.Regular Expressions - III  
Write a program to read two strings S1 & S2, compute the number of times that S2 appears  
in S1.  
Include a class UserMainCode with a static method searchString which accepts the two  
strings. The return type is the integer giving the count.  
Note: The check is case-insensitive.  
Create a Class Main which would be used to accept the two strings and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of two strings.  
Output consists of count indicating the number of occurances.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Catcowcat  
cat  
Sample Output 1:  
2
Sample Input 2:  
Catcowcat  
catp  
Sample Output 2:  
0
Main  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
String s2=s.next();  
int v=UserMainCode.searchString(s1,s2);  
System.out.println(v);  
s.close();  
}
}
UserMainCode  
public class UserMainCode {  
public static int searchString(String s1,String s2){  
int c=0;  
int t=s2.length();  
for(int i=0;i<s1.length()-t+1;i++){  
if(s2.equals(s1.substring(i,t+i))){  
c++;  
}
}
return c;  
}
}
4
7.Strings Processing  
Write a program to read a string that contains comma separated fruit names and also a  
number N. Pick the nth fruit and return it. If the total number of elements are less than the  
number specified in N, then return the last element.  
Include a class UserMainCode with a static method findFruitName which accepts the the  
string and the number n. The return type is the string which has the fruit name.  
Create a Class Main which would be used to accept the string and integer and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string and integer.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Apple,Banana,Orange  
2
Sample Output 1:  
Banana  
Sample Input 2:  
Apple,Banana,Orange  
4
Sample Output 2:  
Orange  
Main  
import java.util.Scanner;  
public class Main  
{
public static void main(String args[])  
{
String str=new String();  
Scanner sc=new Scanner(System.in);  
str=sc.nextLine();  
int n=sc.nextInt();  
String k=UserMainCode.findFruitName(str, n);  
System.out.println(k);  
sc.close();  
}
}
UserMainCode  
import java.util.StringTokenizer;  
public class UserMainCode  
{
public static String findFruitName(String m,int n)  
{
int i=0;  
String h=null;  
StringTokenizer st=new StringTokenizer(m,",");  
int max=st.countTokens();  
String[] ss=new String[max];  
while(st.hasMoreElements())  
{
ss[i++]=st.nextToken();  
}
if(n>max)  
h=ss[i-1];  
else  
h=ss[n-1];  
return h;  
}
}
4
8.Proper Case  
Write a program to read a string and convert the intial letter of each word to uppercase.  
Include a class UserMainCode with a static method changeCase which accepts the string.  
The return type is the modified string.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
This is cognizant academy  
Sample Output 1:  
This Is Cognizant Academy  
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args){  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
System.out.println(UserMainCode.changeCase(s1));  
s.close();  
}
}
UserMainCode  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static String changeCase(String s1){  
StringBuffer s5=new StringBuffer();  
StringTokenizer t=new StringTokenizer(s1," ");  
while(t.hasMoreTokens()){  
String s2=t.nextToken();  
String s3=s2.substring(0,1);  
String s4=s2.substring(1, s2.length());  
s5.append(s3.toUpperCase()).append(s4).append(" ");  
}
return s5.toString();  
}
}
4
9.Length of same word  
Write a program to read a string containing multiple words find the first and last words, if  
they are same, return the length and if not return the sum of length of the two words.  
Include a class UserMainCode with a static method compareLastWords which accepts  
the  
string. The return type is the length as per problem.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
This is Cognizant Academy  
Sample Output 1:  
1
1
Sample Input 2:  
Hello World Hello  
Sample Output 2:  
5
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
// TODO Auto-generated method stub  
String s1=sc.nextLine();  
System.Out.Println(UserMainCode.compareLastWords(s1));  
sc.close();  
}
}
UserMainCode  
import java.util.ArrayList;  
import java.util.List;  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static int compareLastWords(String s1){  
List<String> l=new ArrayList<String>();  
StringTokenizer t=new StringTokenizer(s1," ");  
while(t.hasMoreTokens())  
{
String s2=t.nextToken();  
l.add(s2);  
}
String s3=l.get(0);  
String s4=l.get(l.size()-1);  
if(s3.equals(s4))  
{
int n=s3.length();  
System.out.println(n);  
}
else  
{
int n1=s3.length();  
int n2=s4.length();  
int n=n1+n2;  
}
Return n;  
}
}
5
0.Perfect Number  
Write a program to that takes a positive integer and returns true if the number is perfect  
number.  
A positive integer is called a perfect number if the sum of all its factors (excluding the  
number itself, i.e., proper divisor) is equal to its value.  
For example, the number 6 is perfect because its proper divisors are 1, 2, and 3, and  
6
1
=1+2+3; but the number 10 is not perfect because its proper divisors are 1, 2, and 5, and  
+2+5 is not equal to 10  
Include a class UserMainCode with a static method getPerfection which accepts the  
number. The return type is boolean (true / false).  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a integer.  
Output consists of TRUE / FALSE.  
Refer sample output for formatting specifications.  
Sample Input 1:  
2
8
Sample Output 1:  
TRUE  
import java.util.*;  
public class Main {  
public static void main(String[] args){  
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
boolean j=(UserMainCode.getPerfection(n));  
if(j==true)  
System.out.println("TRUE");  
else  
System.out.println("FALSE");  
}
}
public class UserMainCode {  
public static boolean getPerfection(int n){  
boolean b=false;  
int sum=0;  
for(int i=1;i<n;i++){  
int r=n%i;  
if(r==0)  
sum=sum+i;  
}
b=(sum==n);  
return b;  
}
}
5
1.Find Digits  
For a given double number with atleast one decimal value, Write a program to compute the  
number of digits before and after the decimal point in the following format –  
noOfDigitsBeforeDecimal:noOfDigitsAfterDecimal.  
Note: Ignore zeroes at the end of the decimal (Except if zero is the only digit after decimal.  
Refer Example 2 and 3)  
Include a class UserMainCode with a static method findNoDigits which accepts the  
decimal  
value. The return type is string.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a double.  
Output consists of string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
8
43.21  
Sample Output 1:  
3
:2  
Sample Input 2:  
2
0.130  
Sample Output 2:  
2
:2  
Sample Input 3:  
0.130  
2
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
double d=s.nextDouble();  
System.out.println(UserMainCode.findNoDigits(d));  
}
}
import java.util.StringTokenizer;  
public class UserMainCode {  
public static String findNoDigits(double d) {  
int n1=0,n2=0;  
String s=String.valueOf(d);  
StringTokenizer t=new StringTokenizer(s,".");  
String s1=t.nextToken();  
String s2=t.nextToken();  
n1=s1.length();  
n2=s2.length();  
if(s1.charAt(0)=='0')  
n1=s1.length()-1;  
if(n2!=1)  
if(s2.charAt(s2.length()-1)=='0')  
n2=s2.length()-1;  
String s3=String.valueOf(n1)+":"+String.valueOf(n2);  
return s3;  
}
}
5
2.Employees & Designations  
A Company wants to obtain employees of a particular designation. You have been assigned  
as the programmer to build this package. You would like to showcase your skills by creating  
a quick prototype. The prototype consists of the following steps:  
Read Employee details from the User. The details would include name and designaton in  
the given order. The datatype for name and designation is string.  
Build a hashmap which contains the name as key and designation as value.  
You decide to write a function obtainDesignation which takes the hashmap and  
designation as input and returns a string List of employee names who belong to that  
designation as output. Include this function in class UserMainCode. Display employee  
name's in ascending order.  
Create a Class Main which would be used to read employee details in step 1 and build the  
hashmap. Call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of employee details. The first number indicates the size of the employees. The  
next two values indicate the employee name employee designation. The last string would  
be the designation to be searched.  
Output consists of a array values containing employee names.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
Manish  
MGR  
Babu  
CLK  
Rohit  
MGR  
Viru  
PGR  
MGR  
Sample Output 1:  
Manish  
Rohit  
import java.util.Iterator;  
import java.util.LinkedHashMap;  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
int k1=Integer.parseInt(sc.nextLine());  
LinkedHashMap<String,String> hm=new LinkedHashMap<String,String>();  
for(int i=0;i<k1;i++)  
{
String k=sc.nextLine();  
String s=sc.nextLine();  
hm.put(k,s);  
}
String n=sc.nextLine();  
LinkedHashMap<String,String> hm1=new LinkedHashMap<String,String>();  
hm1=UserMainCode.obtainDesignation(hm,n);  
Iterator<String> it=hm1.keySet().iterator();  
while(it.hasNext())  
{
String s2=it.next();  
System.out.println(s2);  
}
}
}
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.LinkedHashMap;  
import java.util.Map;  
import java.util.Scanner;  
public class UserMainCode  
{
public static LinkedHashMap<String,String>  
obtainDesignation(LinkedHashMap<String,String> h1,String n)  
{
int k=0;  
LinkedHashMap<String,String> hm1=new LinkedHashMap<String,String>();  
Iterator<String>it=h1.keySet().iterator();  
while(it.hasNext())  
{
String s2=it.next();  
String s3=h1.get(s2);  
if(s3.equals(n))  
hm1.put(s2,s3);  
}
return hm1;  
}}  
5
3. Grade Calculator  
A School wants to give assign grades to its students based on their marks. You have been  
assigned as the programmer to automate this process. You would like to showcase your  
skills by creating a quick prototype. The prototype consists of the following steps:  
Read student details from the User. The details would include name, mark in the given  
order. The datatype for name is string, mark is float.  
You decide to build a hashmap. The hashmap contains name as key and mark as value.  
BUSINESS RULE:  
1
. If Mark is less than 60, then grade is FAIL.  
2
. If Mark is greater than or equal to 60, then grade is PASS.  
Note: FAIL/PASS should be in uppercase.  
Store the result in a new Hashmap with name as Key and grade as value.  
4
. You decide to write a function calculateGrade which takes the above hashmap as input  
and returns the hashmap as output. Include this function in class UserMainCode.  
Create a Class Main which would be used to read student details in step 1 and build the  
hashmap. Call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of student details. The first number indicates the size of the students. The  
next two values indicate the name, mark.  
Output consists of a name and corresponding grade for each student.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
Avi  
7
6.36  
Sunil  
6
8.42  
Raja  
3
6.25  
Sample Output 1:  
Avi  
PASS  
Sunil  
PASS  
Raja  
FAIL  
import java.util.Iterator;  
import java.util.LinkedHashMap;  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
int k1=Integer.parseInt(sc.nextLine());  
LinkedHashMap<String,String> hm=new LinkedHashMap<String,String>();  
for(int i=0;i<k1;i++)  
{
String k=sc.nextLine();  
String s=sc.nextLine();  
hm.put(k,s);  
}
String n=sc.nextLine();  
LinkedHashMap<String,String> hm1=new LinkedHashMap<String,String>();  
hm1=UserMainCode.obtainDesignation(hm,n);  
Iterator<String> it=hm1.keySet().iterator();  
while(it.hasNext())  
{
String s2=it.next();  
System.out.println(s2);  
}
}
}
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.LinkedHashMap;  
import java.util.Map;  
import java.util.Scanner;  
public class UserMainCode  
{
public static LinkedHashMap<String,String>  
obtainDesignation(LinkedHashMap<String,String> h1,String n)  
{
int k=0;  
LinkedHashMap<String,String> hm1=new LinkedHashMap<String,String>();  
Iterator<String>it=h1.keySet().iterator();  
while(it.hasNext())  
{
String s2=it.next();  
String s3=h1.get(s2);  
if(s3.equals(n))  
hm1.put(s2,s3);  
}
return hm1;  
}}  
5
4. DOB - Validation  
Write a program to validate the Date of Birth given as input in String format (MM/dd/yyyy)  
as per the validation rules given below. Return true for valid dates else return false.  
1
2
. Value should not be null  
. month should be between 1-12, date should be between 1-31 and year should be a four  
digit number.  
Include a class UserMainCode with a static method ValidateDOB which accepts the string.  
The return type is TRUE / FALSE.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE / FALSE.  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
2/23/1985  
Sample Output 1:  
TRUE  
Sample Input 2:  
3
1/12/1985  
Sample Output 2:  
FALSE  
import java.text.SimpleDateFormat;  
import java.util.Date;  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
String str=new String();  
Scanner sc=new Scanner(System.in);  
str=sc.nextLine();  
Boolean b=UserMainCode.ValidateDOB(str);  
if(b==”true”)  
System.out.println("TRUE");  
if(b==”false”)  
System.out.println("FALSE");  
}
}
import java.text.SimpleDateFormat;  
import java.util.Date;  
public class UserMainCode {  
public static Boolean ValidateDOB(String str){  
Boolean b=”false”;  
SimpleDateFormat sdf=new SimpleDateFormat("MM/dd/yyyy");  
sdf.setLenient(false);  
try  
{
Date d1=sdf.parse(str);  
return b=”true”;  
}
catch(Exception e)  
{
return b=”false”;  
}
}
}
5
5.Experience Validator  
Write a program to valiadate the experience of an employee.  
An employee who has recently joined the organization provides his year of passing and  
total number of years of experience in String format. Write code to validate his experience  
against the current date.  
1
) Input consists of two String first represent the year of passed out and the second string  
reperesent the year of experience.  
) create a function with name validateExp which accepts two string as input and boolean  
as output.  
) The difference between current year and year of pass should be more than or equal to  
2
3
Experience  
Return true if all condition are true.  
Note:Conside 2015 as the current year.  
Include a class UserMainCode with the static function validateExp  
Create a Class Main which would be used to accept the boolean and call the static method  
present in UserMainCode.  
Input and Output Formate:  
Input consists of two Strings.  
output will display true if the given data are correct.  
Sample Input:  
2
5
001  
Sample Output:  
TRUE  
import java.util.ArrayList;  
import java.util.HashMap;  
import java.util.Scanner;  
public class Main {  
public static void main(String args[]){  
Scanner sc = new Scanner(System.in);  
String s=sc.nextLine();  
String s1=sc.nextLine();  
System.out.println(UserMainCode.validateExp(s,s1));  
}
}
import java.util.Calendar;  
import java.util.Date;  
public class UserMainCode {  
public static boolean validateExp(String s,String s1)  
{
int y1=Integer.parseInt(s);  
Date d=new Date();  
Calendar c=Calendar.getInstance();  
int y2=c.get(Calendar.YEAR);  
int y=Math.abs(y1-y2);  
int e=Integer.parseInt(s1);  
if(y>=e)  
return true;  
else  
return false;  
}}  
5
6. ArrayList to String Array  
Write a program that performs the following actions:  
Read n strings as input.  
Create an arraylist to store the above n strings in this arraylist.  
Write a function convertToStringArray which accepts the arraylist as input.  
The function should sort the elements (strings) present in the arraylist and convert them  
into a string array.  
Return the array.  
Include a class UserMainCode with the static method convertToStringArray which  
accepts  
an arraylist and returns an array.  
Create a Class Main which would be used to read n strings and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of n+1 integers. The first integer denotes the size of the arraylist, the next n  
strings are values to the arraylist.  
Output consists of an arrayas per step 4.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
a
d
c
b
Sample Output 1:  
a
b
c
d
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
ArrayList<String> l=new ArrayList<String>();  
int n=s.nextInt();  
for(int i=0;i<n;i++)  
{
l.add(s.next());  
}
String a[]=new String[n];  
a=UserMainCode.convertToStringArray(l);  
for(int j=0;j<n;j++)  
{
System.out.println(a[j]);  
}
}
}
import java.util.ArrayList;  
import java.util.Collections;  
class UserMainCode  
{
public static String[] convertToStringArray(ArrayList<String> l)  
{
Collections.sort(l);  
String [] a = l.toArray(new String[l.size()]);  
return a;  
}
}
5
7.State ID generator  
Write a program to generate the state ID.  
1
2
3
)Read n Strings as input(as State Name).  
)Create a String Array to Store the above Input.  
)Write a function getStateId which accepts String Array as input.  
4
5
)Create a HashMap<String,String> which stores state name as key and state Id as Value.  
)The function getStateId returns the HashMap to the Main Class.  
Include UserMainCode Class With static method getStateId which accepts String array and  
return a hashmap.  
Create a Class Main which would be used to read n strings and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input Consists of an integer n denotes the size of the string array.  
Output consists of an HashMap displayed in the string array order.  
Sample Input 1:  
3
Kerala  
Gujarat  
Goa  
Sample Output 1:  
KER:Kerala  
GUJ:Gujarat  
GOA:Goa  
Main Class  
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
String[] s1=new String[n];  
for(int i=0;i<n;i++)  
{
s1[i]=s.next();  
}
HashMap<String, String> hm = new HashMap<String, String>();  
hm = UserMainCode.putvalues(s1);  
for(Map.Entry<String, String> ans: hm.entrySet())  
{
System.out.println(ans.getKey()+":"+ans.getValue());  
}
}}  
User main code  
import java.util.ArrayList;  
import java.util.HashMap;  
import java.util.Map;  
public class UserMainCode{  
public static HashMap<String, String> putvalues(String[] s1)  
{
HashMap<String, String> hm = new HashMap<String, String>();  
ArrayList<String> lst1 = new ArrayList<String>();  
ArrayList<String> lst2 = new ArrayList<String>();  
for(String s : s1)  
lst1.add(s.toUpperCase().substring(0,3));  
for(String s : s1)  
lst2.add(s);  
for(int i=0;i<s1.length;i++)  
{
hm.put(lst1.get(i),lst2.get(i));  
}
return hm;  
}
}
5
8. ArrayList to String Array  
Write a program that performs the following actions:  
1
2
3
4
5
6
.Read m strings as input (fruit names).  
.Create an arraylist to store the above m strings in this arraylist.  
.Read n strings as input (fruit names).  
.Create an arraylist to store the above n strings in this arraylist.  
.Write a function fruitSelector which accepts the arraylists as input.  
.Remove all fruits whose name ends with 'a' or 'e' from first arrayList and remove all fruits  
whose name begins with 'm' or 'a' from second arrayList then combine the two lists and  
return the final output as a String array.  
7
.If the array is empty the program will print as “No fruit found”  
Include a class UserMainCode with the static method fruitSelector which accepts the two  
arraylists and returns an array.  
Create a Class Main which would be used to read n strings and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of an integer (m) denoting the size of first arraylist. The next m elements  
would be the values of the first arraylist. The next input would be n denoting the size of the  
second arraylist. The next n elements would be the values of the second arraylist.  
Output consists of an array as per step 6. Refer sample output for formatting specifications.  
Sample Input 1:  
3
Apple  
Cherry  
Grapes  
4
Orange  
Mango  
Melon  
Apple  
Sample Output 1:  
Cherry  
Grapes  
Orange  
USERMAINCODE:  
import java.util.ArrayList;  
import java.util.*;  
public class UserMainCode {  
public static String[] fruitSelector(ArrayList<String> a1,ArrayList<String> a2)  
{
ArrayList<String> a3=new ArrayList<String>();  
for(int i=0;i<a1.size();i++)  
{
String s1=a1.get(i);  
if(s1.charAt(s1.length()-1)!='a'&&s1.charAt(s1.length()-1)!='e'&&s1.charAt(s1.length()-  
1)!='A'&&s1.charAt(s1.length()-1)!='E')  
{
a3.add(s1);  
}
}
ArrayList<String> a4=new ArrayList<String>();  
for(int j=0;j<a2.size();j++)  
{
String s2=a2.get(j);  
if(s2.charAt(0)!='m'&&s2.charAt(0)!='a'&&s2.charAt(0)!='M'&&s2.charAt(0)!='A')  
{
a4.add(s2);  
}
}
a3.addAll(a4);  
Collections.sort(a3);  
String st[]=new String[a3.size()];  
for(int k=0;k<a3.size();k++)  
{
st[k]=a3.get(k);  
}
return st;  
}
}
MAIN:  
import java.util.*;  
import java.util.ArrayList;  
public class Main {  
public static void main(String [] args)  
{
Scanner s=new Scanner(System.in);  
int m=s.nextInt();  
ArrayList<String> aa1=new ArrayList<String>();  
for(int i=0;i<m;i++)  
{
aa1.add(s.next());  
}
int n=s.nextInt();  
ArrayList<String> aa2=new ArrayList<String>();  
for(int j=0;j<n;j++)  
{
aa2.add(s.next());  
}
int k;  
String st[]=UserMainCode.fruitSelector(aa1,aa2);  
for( k=0;k<st.length;k++)  
{
System.out.println(st[k]);  
}
if(st.length==0)  
System.out.println("No Fruit Found");  
s.close();  
}
}
5
9)Elements in ArrayList  
Use Collection Methods.  
Write a program that takes two ArrayLists as input and finds out all elements present either  
in A or B, but not in both.  
Include a class UserMainCode with the static method arrayListSubtractor which accepts the  
two arraylists and returns an array.  
Create a Class Main which would be used to read the inputs and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of an integer (m) denoting the size of first arraylist. The next m elements  
would be the values of the first arraylist. The next input would be n denoting the size of the  
second arraylist. The next n elements would be the values of the second arraylist.  
Output consists of an array. The elements in the output array need to be printed in sorted  
order.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
1
8
3
5
2
3
5
Sample Output 1:  
1
8
Sample Input 2:  
4
9
1
3
5
4
1
3
5
6
Sample Output 2:  
6
9
MAIN:  
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
int n,m;  
Scanner sin = new Scanner(System.in);  
n = sin.nextInt();  
ArrayList<Integer> a1 = new ArrayList<Integer>(n);  
for(int i=0;i<n;i++)  
{
int k = sin.nextInt();  
a1.add(k);  
}
m = sin.nextInt();  
ArrayList<Integer> a2 = new ArrayList<Integer>(m);  
for(int i=0;i<m;i++)  
{
int k = sin.nextInt();  
a2.add(k);  
}
int[] result = UserMainCode.arrayListSubtractor(a1,a2);  
Arrays.sort(result);  
for(int i=0;i<result.length;i++)  
System.out.println(result[i]);  
}
}
USERMAINCODE:  
import java.util.ArrayList;  
public class UserMainCode  
{
public static int[] arrayListSubtractor(ArrayList<Integer>  
arrlist1,ArrayList<Integer>  
arrlist2)  
{
int count=0,key;  
int max = arrlist1.size();  
if(arrlist1.size() < arrlist2.size())  
max = arrlist2.size();  
ArrayList<Integer> temp = new ArrayList<Integer>(max);  
for(int i=0;i<arrlist1.size();i++)  
{
key = (int)arrlist1.get(i);  
if(arrlist2.indexOf(key) == -1)  
{
+
+count;  
temp.add(key);  
}
}
for(int i=0;i<arrlist2.size();i++)  
{
key = (int)arrlist2.get(i);  
if(arrlist1.indexOf(key) == -1)  
{
if(!temp.contains(key))  
{
+
+count;  
temp.add(key);  
}
}
}
int[] result = new int[count];  
for(int i=0;i<count;i++)  
result[i] = (int)temp.get(i);  
return result;  
}
}
6
0.Price Calculator - II  
Write a small price calculator application with the below mentioned flow:  
. Read a value n indicating the total count of devices. This would be followed by the name  
and price of the device. The datatype for name would be String and price would be float.  
1
2
3
. Build a hashmap containing the peripheral devices with name as key and price as value.  
. Read a value m indicating the number of devices for which the price has to be calculated.  
This would be followed by device names.  
4
5
. For each devices mentioned in the array calcuate the total price.  
. You decide to write a function costEstimator which takes the above hashmap and array as  
input and returns the total price (float) as output with two decimal points. Include this  
function in class UserMainCode.  
Create a Class Main which would be used to read details in step 1 and build the hashmap.  
Call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of device details. The first number indicates the size of the devices. The next  
two values indicate the name,price.  
This would be followed by m indicating the size of the device array. The next m values would  
be the device names.  
Output consists of the total price in float.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
Monitor  
1
200.36  
Mouse  
00.42  
Speakers  
1
5
2
00.25  
Speakers  
Mouse  
Sample Output 1:  
6
00.67  
MAIN:  
import java.util.HashMap;  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner S=new Scanner(System.in);  
int n=S.nextInt();  
HashMap<String, Float> m1=new HashMap<String, Float>();  
for(int i=0;i<n;i++)  
{
String name=S.next();  
float price=S.nextFloat();  
m1.put(name,price);  
}
int m=S.nextInt();  
String s[]=new String[m];  
for(int j=0;j<m;j++)  
{
s[j]=S.next();  
}
System.out.println(UserMainCode.getTheTotalCostOfPheripherals  
(
}
m1,s));  
}
USERMAINCODE:  
import java.util.HashMap;  
import java.util.Iterator;  
public class UserMainCode {  
public static float getTheTotalCostOfPheripherals(HashMap<String,Float> m1,  
String[] s) {  
Float f=(float) 0;  
Iterator<String> i=m1.keySet().iterator();  
while(i.hasNext()){  
String s1=i.next();  
Float f1=m1.get(s1);  
for(int j=0;j<s.length;j++)  
if(s[j].equals(s1))  
f+=f1; }  
return f;  
}
}
6
1.String Processing - ZigZag  
Write a program to read a string containing date in DD-MM-YYYY format. find the number of  
days in the given month.  
Note - In leap year February has got 29 days.  
Include a class UserMainCode with a static method getLastDayOfMonth which accepts  
the  
string. The return type is the integer having number of days.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
2-06-2012  
Sample Output 1:  
3
0
Sample Input 2:  
0-02-2012  
Sample Output 2:  
1
2
9
MAIN:  
import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStreamReader;  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.*;  
public class Main {  
public static void main(String[] args) throws IOException,  
ParseException {  
Scanner S=new Scanner(System.in);  
String s1=S.next();  
UserMainCode.getLastDayOfMonth(s1);  
}
}
USERMAINCODE:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.Calendar;  
import java.util.Date;  
public class UserMainCode {  
public static void getLastDayOfMonth(String s1) throws ParseException{  
SimpleDateFormat sdf=new SimpleDateFormat("dd-MM-yyyy");  
Calendar cal=Calendar.getInstance();  
Date d1=sdf.parse(s1);  
cal.setTime(d1);  
int n=cal.getActualMaximum(Calendar.DAY_OF_MONTH);  
System.out.println(n);  
}
}
6
2.Leap Year  
Write a program to read a string containing date in DD/MM/YYYY format and check if its a  
leap year. If so, return true else return false.  
Include a class UserMainCode with a static method isLeapYear which accepts the string.  
The  
return type is the boolean indicating TRUE / FALSE.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE / FALSE.  
Refer sample output for formatting specifications.  
Sample Input 1:  
2
3/02/2012  
Sample Output 1:  
TRUE  
Sample Input 2:  
1
2/12/2011  
Sample Output 2:  
FALSE  
MAIN:  
import java.io.IOException;  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.*;  
public class Main {  
public static void main(String[] args) throws IOException, ParseException {  
Scanner S=new Scanner(System.in);  
String s1=S.next();  
UserMainCode.isLeapyear(s1);  
}
}
USERMAINCODE:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.Date;  
import java.util.GregorianCalendar;  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static void isLeapyear(String s1) throws ParseException{  
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
GregorianCalendar g=new GregorianCalendar();  
StringTokenizer t=new StringTokenizer(s1,"/");  
String s2=t.nextToken();  
String s3=t.nextToken();  
String s4=t.nextToken();  
int n1=Integer.parseInt(s4);  
Date d1=sdf.parse(s1);  
boolean b=g.isLeapYear(n1);  
System.out.println(b);  
}
}
6
3) Largest Chunk  
Write a program to read a string and return the length of the largest "chunk" in the string.  
A chunk is a repetition of same character 2 or more number of times. If the given string  
doest not contain any repeated chunk of characters return -1.  
Include a class UserMainCode with a static method getLargestSpan which accepts the  
string.  
The return type is the integer.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
This place is soooo good  
Sample Output 1:  
4
MAIN:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner S=new Scanner(System.in);  
String s1=S.nextLine();  
System.out.println(UserMainCode.getLargestSpan(s1));  
}
}
USERMAINCODE:  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static int getLargestSpan(String s1) {  
int max=0;  
StringTokenizer t=new StringTokenizer(s1," ");  
while(t.hasMoreTokens()){  
String s2=t.nextToken();  
int n=0;  
for(int i=0;i<s2.length()-1;i++)  
if(s2.charAt(i)==s2.charAt(i+1))  
n++;  
if(n>max)  
max=n;  
}
return (max+1);  
}
}
6
4) Largest Span  
Write a program to read a integer array, find the largest span in the array.  
Span is the count of all the elements between two repeating elements including the  
repeated elements.  
Include a class UserMainCode with a static method getLargestSpan which accepts the  
integer array. The return type is integer.  
Create a Class Main which would be used to accept the integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of an integer n which is the number of elements followed by n integer values.  
Output consists of integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
6
4
2
1
4
5
7
Sample Output 1:  
4
MAIN:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
int []a=new int[n];  
for(int i=0;i<n;i++)  
{
a[i]=sc.nextInt();  
}
System.out.print(UserMainCode.getLargestSpan(a,n));  
}
}
USERMAINCODE:  
public class UserMainCode {  
public static int getLargestSpan(int[] x,int n)  
{
int gap=0,max=0;  
for(int i=0;i<n;i++)  
{
for(int j=i+1;j<n;j++)  
{
if(x[i]==x[j])  
{
gap=j;  
}
}
if(gap-i>max)  
max=gap-i;  
}
return max+1;  
}
}
6
5 )Even Sum & Duplicate Elements  
Write a program to read a integer array, Remove the duplicate elements and display sum of  
even numbers in the output. If input array contain only odd number then return -1.  
Include a class UserMainCode with a static method sumElements which accepts the  
integer  
array. The return type is integer.  
Create a Class Main which would be used to accept the integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of an integer n which is the number of elements followed by n integer values.  
Output consists of integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
7
2
3
5
1
6
7
7
4
Sample Output 1:  
6
2
Sample Input 2:  
6
3
7
9
1
1
2
3
7
1
Sample Output 2:  
-
1
MAIN:  
import java.util.HashMap;  
import java.util.LinkedHashMap;  
import java.util.LinkedHashSet;  
import java.util.Scanner;  
public class Main  
{
public static void main(String args[])  
{
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
int a[]=new int[n];  
for(int i=0;i<n;i++)  
{
a[i]=sc.nextInt();  
}
System.out.println(UserMainCode.sumElements(a));  
}
}
USERMAINCODE:  
import java.util.Iterator;  
import java.util.LinkedHashSet;  
public class UserMainCode {  
public static int sumElements(int a[])  
{
LinkedHashSet<Integer>h1=new LinkedHashSet<Integer>();  
int s=0;  
for(int i=0;i<a.length;i++)  
{
h1.add(a[i]);  
}
Iterator<Integer> it=h1.iterator();  
while(it.hasNext())  
{
int k=it.next();  
if(k%2==0)  
{
s=s+k;  
}
}
if(s>0)  
return s;  
else  
return -1;  
}
}
6
6. Regular Expression - III  
Given a string (s) apply the following rules.  
I)At least 8 characters must be present  
II)At least one capital letter must be present  
III)At least one small letter must be present  
Iv)At least one special symbol must be present  
V)At least one numeric value must be present  
If the condition is satisifed then print valid else print invalid.  
Include a class UserMainCode with a static method passwordValidation which accepts the  
string. The return type is the string.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of string (valid / invalid) .  
Refer sample output for formatting specifications.  
Sample Input 1:  
Technology$1213  
Sample Output 1:  
valid  
Main:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String a=s.next();  
System.out.println(UserMainCode.passwordValidation(a));  
s.close();  
}
}
UserMainCode:  
public class UserMainCode  
{
public static String passwordValidation(String a)  
{
String k;  
if(a.matches(".*[0-  
9
]{1,}.*")&&a.matches(".*[@#$]{1,}.*")&&a.length()>=8&&a.matches(".*[A-  
Z]{1,}.*")&&a.matches(".*[a-z].*"))  
{
k="validinput";  
}
else  
{
k="Invalidinput";  
}
return k;  
}
}
6
7. Integer Factorial  
Give an array of integer as input, store the numbers and their factorials in an hashmap and  
print the same.  
Include a class UserMainCode with a static method getFactorial which accepts the integer  
array. The return type is the hashmap which is printed key:value.  
Create a Class Main which would be used to accept the integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a number denoting the size of the array and followed by the elements.  
Output consists of a hashmap printed in the output format .  
Refer sample output for formatting specifications.  
Sample Input1:  
4
2
3
5
4
Sample Output1:  
2
3
5
4
:2  
:6  
:120  
:24  
Main:  
import java.util.Iterator;  
import java.util.LinkedHashMap;  
import java.util.Scanner;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int a=Integer.parseInt(s.nextLine());;  
int[]k=new int[a];  
for(int i=0;i<a;i++)  
{
k[i]=s.nextInt();  
}
LinkedHashMap<Integer,Integer>hm=new LinkedHashMap<Integer,Integer>();  
hm=UserMainCode.getFactorial(k);  
Iterator<Integer> it=hm.keySet().iterator();  
for(int i=0;i<a;i++)  
{
int n=it.next();  
int fac=hm.get(n);  
System.out.println(n+":"+fac);  
s.close();  
}
}
}
UserMainCode;  
import java.util.LinkedHashMap;  
public class UserMainCode  
{
public static LinkedHashMap<Integer,Integer> getFactorial(int[] k)  
{
LinkedHashMap<Integer,Integer> hm1=new LinkedHashMap<Integer,Integer>();  
for(int i=0;i<k.length;i++)  
{
int u=1;  
for(int j=1;j<=k[i];j++)  
{
u=u*j;  
}
hm1.put(k[i],u);  
}
return hm1;  
}
}
6
8. String processing – Long + Short + Long  
Obtain two strings S1,S2 from user as input. Your program should form a string  
of “long+short+long”, with the shorter string inside of the longer String.  
Include a class UserMainCode with a static method getCombo which accepts two string  
variables. The return type is the string.  
Create a Class Main which would be used to accept two Input strings and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of two strings with maximum size of 100 characters.  
Output consists of an string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Hello  
Hi  
Sample Output 1:  
HelloHiHello  
Main;  
import java.util.Scanner;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String s1=s.next();  
String s2=s.next();  
System.out.println(UserMainCode.getCombo(s1,s2));  
s.close();  
}
}
UserMainCode;  
public class UserMainCode  
{
public static String getCombo(String s1,String s2)  
{
StringBuffer sb=new StringBuffer();  
int p=s1.length();  
int q=s2.length();  
if(p>q)  
{
sb.append(s1).append(s2).append(s1);  
}
else  
{
sb.append(s2).append(s1).append(s2);  
}
return sb.toString();  
}
}
6
9. Age for Voting  
Given a date of birth (dd/MM/yyyy) of a person in string, compute his age as of 01/01/2015.  
If his age is greater than 18, then println eligible else println not-eligible.  
Include a class UserMainCode with a static method getAge which accepts the string value.  
The return type is the string.  
Create a Class Main which would be used to accept the two string values and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of two string.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
6/11/1991  
Sample Output 1:  
eligible  
Main:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String a=s.nextLine();  
System.out.println(UserMainCode.getAge(a));  
s.close();  
}
}
UserMainCode:  
import java.text.SimpleDateFormat;  
import java.util.Date;  
import java.util.Scanner;  
public class UserMainCode  
{
public static String getAge(String n)  
{
Scanner s=new Scanner(System.in);  
int year=0;  
String s1=s.next();  
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
try  
{
Date d=sdf.parse(n);  
Date d1=sdf.parse(s1);  
int y=d.getYear();  
int y1=d1.getYear();  
int m=d.getMonth();  
int m1=d1.getMonth();  
int day=d.getDate();  
int day1=d1.getDate();  
year=y1-y;  
if(m>m1)  
year--;  
else if(m==m1)  
{
if(day<day1)  
year--;  
}
}
catch(Exception e)  
{
e.printStackTrace();  
}
if(year>18)  
return "eligible";  
else  
return "not-eligible";  
}
}
1
. Unique Even Sum  
Write a program to read an array, eliminate duplicate elements and calculate the sum of even  
numbers (values) present in the  
array.  
Include a class UserMainCode with a static method addUniqueEven which accepts a single  
integer array. The return type  
(integer) should be the sum of the even numbers. In case there is no even number it should  
return -1.  
Create a Class Main which would be used to accept Input array and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of n+1 integers. The first integer corresponds to n, the number of elements in  
the array. The next 'n' integers  
correspond to the elements in the array.  
In case there is no even integer in the input array, print no even numbers as output. Else print  
the sum.  
Refer sample output for formatting specifications.  
Assume that the maximum number of elements in the array is 20.  
Sample Input 1:  
4
2
5
1
4
Sample Output 1:  
6
Sample Input 2:  
3
1
1
1
Sample Output 2:  
no even numbers  
Main:  
import java.util.Scanner;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
int[] a=new int [n];  
for(int i=0;i<n;i++)  
{
a[i]=s.nextInt();  
}
System.out.println(UserMainCode.addUniqueEven(a));  
s.close();  
}
}
UserMainCode;  
import java.util.Iterator;  
import java.util.LinkedHashSet;  
public class UserMainCode  
{
public static int addUniqueEven(int[] a)  
{
int sum=0;  
LinkedHashSet<Integer> hm=new LinkedHashSet<Integer>();  
for(int i=0;i<a.length;i++)  
{
hm.add(a[i]);  
}
Iterator<Integer> im=hm.iterator();  
while(im.hasNext())  
{
int b=im.next();  
if(b%2==0)  
sum=sum+b;  
}
if(sum>0)  
{
return sum;  
}
else  
return -1;  
}
}
2
. Palindrome & Vowels  
Write a program to check if a given string is palindrome and contains at least two different  
vowels.  
Include a class UserMainCode with a static method checkPalindrome which accepts a string.  
The return type (integer)  
should be 1 if the above condition is satisfied, otherwise return -1.  
Create a Class Main which would be used to accept Input string and call the static method  
present in UserMainCode.  
Note – Case Insensitive while considering vowel, i.e a & A are same vowel, But Case  
sensitive while considering  
palindrome i.e abc CbA are not palindromes.  
Input and Output Format:  
Input consists of a string with maximum size of 100 characters.  
Output consists of a single Integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
abceecba  
Sample Output 1:  
valid  
Sample Input 2:  
abcd  
Sample Output 2:  
invalid  
Main;  
import java.util.Scanner;  
public class Main  
{
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
String s=sc.nextLine();  
System.out.println(UserMainCode.checkPalindrome(s));  
sc.close();  
}
}
UserMainCode;  
import java.util.Iterator;  
import java.util.LinkedHashSet;  
public class UserMainCode  
{
public static int checkPalindrome(String s)  
{
StringBuffer sb=new StringBuffer(s);  
int k=0;  
LinkedHashSet<Character>l1=new LinkedHashSet<Character>();  
String s2=sb.reverse().toString();  
if(s2.equals(s))  
{
String s3=s2.toLowerCase();  
for(int i=0;i<s3.length();i++)  
{
l1.add(s3.charAt(i));  
}
Iterator<Character> it=l1.iterator();  
while(it.hasNext())  
{
char a=it.next();  
if(a=='a'||a=='e'||a=='i'||a=='o'||a=='u')  
k++;  
}
}
if(k>=2)  
return 1;  
else  
return -1;  
}
}
3
. Strings – Unique & Existing Characters  
Obtain two strings from user as input. Your program should modify the first string such that  
all the characters are replaced  
by plus sign (+) except the characters which are present in the second string.  
That is, if one or more characters of first string appear in second string, they will not be  
replaced by +.  
Return the modified string as output. Note - ignore case.  
Include a class UserMainCode with a static method replacePlus which accepts two string  
variables. The return type is the  
modified string.  
Create a Class Main which would be used to accept two Input strings and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of two strings with maximum size of 100 characters.  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
abcxyz  
axdef  
Sample Output 1:  
a++ x++  
Sample Input 2:  
ABCDEF  
feCBAd  
Sample Output 2:  
ABCDEF  
Main;  
import java.util.Scanner;  
public class Main  
{
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
String s=sc.next();  
String s1=sc.next();  
System.out.println(UserMainCode.replacePlus(s,s1));  
sc.close();  
}
}
UserMainCode;  
public class UserMainCode  
{
public static String replacePlus(String s,String s1)  
{
{
String s2=s.toLowerCase();  
String s3=s1.toLowerCase();  
StringBuffer sb=new StringBuffer();  
for(int i=0;i<s.length();i++)  
{
char c=s2.charAt(i);  
if(s3.indexOf(c)==-1)  
sb.append("+");  
else  
sb.append(s.charAt(i));  
}
}
}
return sb.toString();  
}
4
. Longest Word  
Write a Program which finds the longest word from a sentence. Your program should read a  
sentence as input from user and  
return the longest word. In case there are two words of maximum length return the word  
which comes first in the sentence.  
Include a class UserMainCode with a static method getLargestWord which accepts a string  
The return type is the longest  
word of type string.  
Create a Class Main which would be used to accept two Input strings and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string with maximum size of 100 characters.  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Welcome to the world of Programming  
Sample Output 1:  
Programming  
Sample Input 2:  
ABC DEF  
Sample Output 2:  
ABC  
Main;  
import java.util.Scanner;  
public class Main  
{
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
System.out.println(UserMainCode.getLargestWord(s1));  
s.close();  
}
}
UserMainCode;  
import java.util.StringTokenizer;  
public class UserMainCode  
{
public static String getLargestWord(String s1)  
{
int max=0;  
String s2=new String();  
StringTokenizer t=new StringTokenizer(s1," ");  
{
while(t.hasMoreTokens()){  
String s3=t.nextToken();  
int n=s3.length();  
if(n>max){  
max=n;  
s2=s3;}  
}
return s2;  
}
}
}
5
. String Occurences  
Obtain two strings from user as input. Your program should count the number of occurences of second word of second  
sentence in the first sentence.  
Return the count as output. Note - Consider case.  
Include a class UserMainCode with a static method countNoOfWords which accepts two string variables. The return type is  
the modified string.  
Create a Class Main which would be used to accept two Input strings and call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of two strings with maximum size of 100 characters.  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
abc bcd abc bcd abc abc  
av abc  
Sample Output 1:  
4
Sample Input 2:  
ABC xyz AAA  
w abc  
Sample Output 2:  
0
UserMainCode  
import java.util.StringTokenizer;  
public class UserMainCode  
{
public static void countNoOfWords(String s1, String s2) {  
int count=0;  
StringTokenizer st=new StringTokenizer(s2," ");  
String s3=st.nextToken();  
String s4=st.nextToken();  
/
/System.out.println(s4);  
StringTokenizer st1=new StringTokenizer(s1," ");  
while(st1.hasMoreTokens())  
{
String s5=st1.nextToken();  
if(s4.equals(s5))  
{
count++;  
}
}
System.out.println(count);  
}
}
Main  
import java.util.*;  
public class Main  
{
/
*
*
**  
@param args  
/
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String s2=s.nextLine();  
UserMainCode.countNoOfWords(s1,s2);  
s.close();  
}
}
6
. ArrayList Manipulation  
Write a program that performs the following actions:  
1
2
3
4
. Read 2n integers as input.  
. Create two arraylists to store n elements in each arraylist.  
. Write a function generateOddEvenList which accepts these two arraylist as input.  
. The function fetch the odd index elements from first array list and even index elements from second array list and  
add them to a new array list according to their index.  
. Return the arraylist.  
5
Include a class UserMainCode with the static method generateOddEvenList which accepts two arraylist and returns an  
arraylist.  
Create a Class Main which would be used to read 2n integers and call the static method present in UserMainCode.  
Note:  
-
-
-
The index of first element is 0.  
Consider 0 as an even number.  
Maintain order in the output array list  
Input and Output Format:  
Input consists of 2n+1 integers. The first integer denotes the size of the arraylist, the next n integers are values to the first  
arraylist, and the last n integers are values to the second arraylist.  
Output consists of a modified arraylist as per step 4.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
1
1
1
1
1
2
3
4
2
3
4
5
6
5
6
Sample Output 1:  
2
1
4
1
6
3
5
UserMainCode  
import java.util.ArrayList;  
import java.util.Iterator;  
public class UserMainCode  
{
public static ArrayList<Integer> generateOddEvenList  
(
ArrayList<Integer>al1,ArrayList<Integer>al2)  
{
ArrayList<Integer>al3=new ArrayList<Integer>();  
for(int i=0;i<al1.size();i++)  
{
if(i%2==0)  
al3.add(al2.get(i));  
else  
al3.add(al1.get(i));  
}
return al3;  
}
}
Main  
import java.util.ArrayList;  
import java.util.Iterator;  
import java.util.Scanner;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
int s=Integer.parseInt(sc.nextLine());  
ArrayList<Integer>al1=new ArrayList<Integer>();  
ArrayList<Integer>al2=new ArrayList<Integer>();  
for(int i=0;i<s;i++)  
al1.add(sc.nextInt());  
for(int i=0;i<s;i++)  
al2.add(sc.nextInt());  
ArrayList<Integer>al3=new ArrayList<Integer>();  
al3=UserMainCode.generateOddEvenList(al1,al2);  
Iterator<Integer> it=al3.iterator();  
while(it.hasNext())  
{
int n=it.next();  
System.out.println(n);  
sc.close();  
}
}
}
7
. Duplicate Characters  
Write a Program which removes duplicate characters from the string. Your program should read a sentence (string) as input  
from user and return a string removing duplicate characters. Retain the first occurance of the duplicate character. Assume the  
characters are case – sensitive.  
Include a class UserMainCode with a static method removeDuplicates which accepts a string. The return type is the  
modified sentence of type string.  
Create a Class Main which would be used to accept the input string and call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of a string with maximum size of 100 characters.  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
hi this is sample test  
Sample Output 1:  
hi tsample  
Sample Input 2:  
ABC DEF  
Sample Output 2:  
ABC DEF  
UserMainCode  
import java.util.HashSet;  
import java.util.Iterator;  
import java.util.LinkedHashSet;  
import java.util.StringTokenizer;  
public class UserMainCode  
{
public static void removeDuplicates(String s1) {  
char a[]=s1.toCharArray();  
StringBuffer sb=new StringBuffer();  
LinkedHashSet<Character>hs=new LinkedHashSet<Character>();  
for(int i=0;i<a.length;i++)  
{
hs.add(a[i]);  
}
Iterator<Character>itr=hs.iterator();  
while(itr.hasNext())  
{
char o=itr.next();  
if(o!=' ');  
{
sb.append(o);  
}
}
System.out.println(sb);  
}
}
Main  
import java.util.*;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
UserMainCode.removeDuplicates(s1);  
s.close();  
}
}
8
. Mastering Hashmap  
You have recently learnt about hashmaps and in order to master it, you try and use it in all of your programs.  
Your trainer / teacher has given you the following exercise:  
1
. Read 2n numbers as input where the first number represents a key and second one as value. Both the numbers are  
of type integers.  
. Write a function getAverageOfOdd to find out average of all values whose keys are represented by odd numbers.  
2
Assume the average is an int and never a decimal number. Return the average as output. Include this function in  
class UserMainCode.  
Create a Class Main which would be used to read 2n numbers and build the hashmap. Call the static method present in  
UserMainCode.  
Input and Output Format:  
Input consists of a 2n+ 1 integers. The first integer specifies the value of n (essentially the hashmap size). The next pair of n  
numbers denote the key and value.  
Output consists of an integer representing the average.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
2
3
1
4
5
1
4
2
4
2
2
Sample Output 1:  
8
UserMainCode  
import java.util.HashMap;  
import java.util.Scanner;  
import java.util.HashMap;  
import java.util.Iterator;  
public class UserMainCode {  
public static int getAverageOfOdd(HashMap<Integer,Integer>h1)  
{
int av=0,c=0,s=0;  
Iterator<Integer> it=h1.keySet().iterator();  
while(it.hasNext())  
{
int a=it.next();  
if(a%2!=0)  
{
int b=h1.get(a);  
s=s+b;  
c++;  
}
}
av=s/c;  
return av;  
}
}
Main  
import java.util.*;  
public class Main  
{
public static void main(String args[])  
{
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
HashMap<Integer,Integer> h1=new HashMap<Integer,Integer>();  
for(int i=0;i<n;i++)  
{
h1.put(sc.nextInt(),sc.nextInt());  
}
System.out.println(UserMainCode.getAverageOfOdd(h1));  
sc.close();  
}
}
9
. Managers & Hashmaps  
A Company wants to automate its payroll process. You have been assigned as the programmer to build this package. You  
would like to showcase your skills by creating a quick prototype. The prototype consists of the following steps:  
1
. Read Employee details from the User. The details would include id, designation and salary in the given order. The  
datatype for id is integer, designation is string and salary is integer.  
. You decide to build two hashmaps. The first hashmap contains employee id as key and designation as value, and the  
second hashmap contains same employee ids as key and salary as value.  
. The company decides to hike the salary of managers by 5000. You decide to write a function increaseSalarieswhich  
2
3
takes the above hashmaps as input and returns a hashmap with only managers id and their increased salary as output. Include  
this function in class UserMainCode.  
Create a Class Main which would be used to read employee details in step 1 and build the two hashmaps.  
Call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of employee details. The first number indicates the size of the employees. The next three values indicate the  
employee id, employee designation and employee salary.  
Output consists of a single string. Refer sample output for formatting specifications.  
SampleInput1:  
2
2
programmer  
3
8
000  
manager  
0000  
5
SampleOutput1:  
8
5
5000  
UserMainCode  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.HashMap;  
public class UserMainCode  
{
public static HashMap<Integer,Integer>  
display(HashMap<Integer,String>hm,HashMap<Integer,Integer>hm1)  
{
HashMap<Integer,Integer>hm3=new HashMap<Integer,Integer>();  
Iterator<Integer> it=hm.keySet().iterator();  
while(it.hasNext())  
{
int id=it.next();  
String name=hm.get(id);  
if(name.equals("manager"))  
{
int salary=hm1.get(id)+5000;  
hm3.put(id,salary);  
}
}
return hm3;  
}
}
Main  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.Scanner;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
int s=Integer.parseInt(sc.nextLine());  
HashMap<Integer,String>hm=new HashMap<Integer,String>();  
HashMap<Integer,Integer>hm1=new HashMap<Integer,Integer>();  
for(int i=0;i<s;i++)  
{
int id=Integer.parseInt(sc.nextLine());  
hm.put(id, sc.nextLine());  
hm1.put(id,Integer.parseInt(sc.nextLine()));  
}
HashMap<Integer,Integer>hm2=new HashMap<Integer,Integer>();  
hm2=UserMainCode.display(hm,hm1);  
Iterator<Integer> it=hm2.keySet().iterator();  
while(it.hasNext())  
{
int n=it.next();  
int fac=hm2.get(n);  
System.out.println(n);  
System.out.println(fac);  
}
}
}
10. Check first and last word  
Write a program to check if the first word and the last word in the input string match.  
Include a class UserMainCode with a static method “check” that accepts a string argument and returns an int. If the first  
word and the last word in the string match, the method returns the number of characters in the word. Else the method returns  
the sum of the number of characters in the first word and last word.  
Create a class Main which would get the input as a String and call the static method check present in the UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output is an integer.  
Sample Input 1:  
how are you you are how  
Sample Output 1:  
3
Sample Input 2:  
how is your child  
Sample Output 2:  
8
UserMainCode  
import java.util.StringTokenizer;  
public class UserMainCode  
{
public static int check(String s)  
{
int count=0;  
String fin="";  
StringTokenizer st=new StringTokenizer(s);  
String ini=st.nextToken();  
while(st.hasMoreTokens())  
{
}
fin=st.nextToken();  
if(ini.equals(fin))  
count=ini.length();  
else  
count=ini.length()+fin.length();  
return count;  
}
}
Main  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.Scanner;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
String age=sc.nextLine();  
System.out.println(UserMainCode.check(age));  
sc.close();  
}
}
1
1. Concatenate Characters  
Given an array of Strings, write a program to take the last character of each string and make a new String by concatenating  
it.  
Include a class UserMainCode with a static method “concatCharacter” that accepts a String array as input and returns the  
new String.  
Create a class Main which would get the String array as input and call the static method concatCharacterpresent in the  
UserMainCode.  
Input and Output Format:  
The first line of the input consists of an integer n that corresponds to the number of strings in the input string array.  
The next n lines of the input consist of the strings in the input string array.  
Output consists of a string.  
Sample Input:  
3
ab  
a
abcd  
Sample Output:  
Bad  
UserMainCode  
public class UserMainCode  
{
public static String concatCharacter(String[] a)  
{
StringBuffer sb=new StringBuffer();  
for(int i=0;i<a.length;i++)  
sb.append(a[i].charAt(a[i].length()-1));  
return sb.toString();  
}
}
Main  
import java.util.*;  
public class Main  
{
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
int s=Integer.parseInt(sc.nextLine());  
String []a=new String[s];  
for(int i=0;i<s;i++)  
{
a[i]=sc.nextLine();  
}
System.out.println(UserMainCode.concatCharacter(a));  
sc.close();  
}
}
12.Anagram  
Write a program to check whether the two given strings are anagrams.  
Note: Rearranging the letters of a word or phrase to produce a new word or phrase, using all the original letters exactly once  
is called Anagram."  
Include a class UserMainCode with a static method “getAnagram” that accepts 2 strings as arguments and returns an int.  
The method returns 1 if the 2 strings are anagrams. Else it returns -1.  
Create a class Main which would get 2 Strings as input and call the static method getAnagram present in the  
UserMainCode.  
Input and Output Format:  
Input consists of 2 strings. Assume that all characters in the string are lower case letters.  
Output consists of a string that is either “Anagrams” or “Not Anagrams”.  
Sample Input 1:  
eleven plus two  
twelve plus one  
Sample Output 1:  
Anagrams  
Sample Input 2:  
orchestra  
carthorse  
Sample Output 2:  
Anagrams  
Sample Input 3:  
cognizant  
technologies  
Sample Output 3:  
Not Anagrams  
UserMainCode  
import java.util.ArrayList;  
import java.util.Collections;  
import java.util.List;  
import java.util.Scanner;  
public class UserMainCode  
{
public static void getAnagram(String s1,String s2)  
{
List<Character> l1=new ArrayList<Character>();  
List<Character> l2=new ArrayList<Character>();  
String s3=s1.replace(" ","");  
String s4=s2.replace(" ","");  
String s5=s3.toUpperCase();  
String s6=s4.toUpperCase();  
for (int i = 0; i < s5.length(); i++)  
{
l1.add(s5.charAt(i));  
}
for (int i = 0; i < s6.length(); i++)  
{
l2.add(s6.charAt(i));  
}
Collections.sort(l1);  
Collections.sort(l2);  
/
/
/ System.out.println(l1);  
/ System.out.println(l2);  
if(l1.equals(l2))  
System.out.println("Anagram");  
else  
System.out.println("Not Anagram");  
}
}
Main  
import java.util.ArrayList;  
import java.util.Collections;  
import java.util.List;  
import java.util.Scanner;  
public class Main{  
public static void main(String[] args)  
{
Scanner sc =new Scanner(System.in);  
String s1=sc.nextLine();  
String s2=sc.nextLine();  
UserMainCode.getAnagram(s1,s2);  
}
}
1
3.Calculate Meter Reading  
Given 2 strings corresponding to the previous meter reading and the current meter reading, write a program to calculate  
electricity bill.  
The input string is in the format ""AAAAAXXXXX"".  
AAAAA is the meter code and XXXXX is the meter reading.  
FORMULA: (XXXXX-XXXXX)*4  
Hint: if AAAAA of input1 and input2 are equal then separate the XXXXX from string and convert to integer. Assume that  
AAAAA of the 2 input strings will always be equal.  
Include a class UserMainCode with a static method “calculateMeterReading” that accepts 2 String arguments and returns  
an integer that corresponds to the electricity bill. The 1st argument corresponds to the previous meter reading and the  
2
nd arguement corresponds to the current meter reading.  
Create a class Main which would get 2 Strings as input and call the static method calculateMeterReading present in the  
UserMainCode.  
Input and Output Format:  
Input consists of 2 strings. The first input corresponds to the previous meter reading and the second input corresponds to the  
current meter reading.  
Output consists of an integer that corresponds to the electricity bill.  
Sample Input:  
CSECE12390  
CSECE12400  
Sample Output:  
4
0
import java.util.Scanner;  
public class Main{  
public static void main (String[] args)  
{
/
/ your code goes here  
Scanner sc = new Scanner(System.in);  
String input1=sc.next();  
String input2=sc.next();  
System.out.println(UserMainCode.calculateMeterReading(input1,input2));  
sc.close();  
}
}
public class UserMainCode {  
public static int calculateMeterReading(String input1, String input2)  
{
int n1=Integer.parseInt(input1.substring(5,input1.length()));  
int n2=Integer.parseInt(input2.substring(5,input2.length()));  
int n=Math.abs((n2-n1)*4);  
return n;  
}
}
1
4.Retirement  
Given an input as HashMap which contains key as the ID and dob as value of employees, write a program to find out  
employees eligible for retirement. A person is eligible for retirement if his age is greater than or equal to 60.  
Assume that the current date is 01/01/2014.  
Include a class UserMainCode with a static method “retirementEmployeeList” that accepts a HashMap<String,String> as  
input and returns a ArrayList<String>. In this method, add the Employee IDs of all the retirement eligible persons to list and  
return the sorted list.  
(Assume date is in dd/MM/yyyy format).  
Create a class Main which would get the HashMap as input and call the static method retirementEmployeeList present in  
the UserMainCode.  
Input and Output Format:  
The first line of the input consists of an integer n, that corresponds to the number of employees.  
The next 2 lines of the input consists of strings that correspond to the id and dob of employee 1.  
The next 2 lines of the input consists of strings that correspond to the id and dob of employee 2.  
and so on...  
Output consists of the list of employee ids eligible for retirement in sorted order.  
Sample Input :  
4
C1010  
0
2/11/1987  
C2020  
5/02/1980  
C3030  
4/12/1952  
T4040  
0/02/1950  
Sample Output :  
C3030, T4040]  
1
1
2
[
import java.text.ParseException;  
import java.util.LinkedHashMap;  
import java.util.Scanner;  
public class Main  
{
public static void main(String args[]) throws ParseException{ Scanner sc=new  
Scanner(System.in); int  
n=Integer.parseInt(sc.nextLine());  
LinkedHashMap<String,String>a1=new LinkedHashMap<String,String>(); for(int  
i=0;i<n;i++) {  
a1.put(sc.nextLine(),sc.nextLine());  
}
System.out.println(UserMainCode.retirementEmployeeList(a1));  
}
}
import java.text.*;  
import java.util.*;  
public class UserMainCode {  
public static ArrayList<String>  
retirementEmployeeList(LinkedHashMap<String,String>a1) throws ParseException  
{
ArrayList<String>al=new ArrayList<String>();  
Iterator <String>it=a1.keySet().iterator();  
while(it.hasNext())  
{String s=it.next();  
String s1=a1.get(s);  
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
sdf.setLenient(false);  
try{  
Date d=new Date();  
Date d1=new Date();  
String a=s1;  
String b="01/01/2014";  
d=sdf.parse(a);  
d1=sdf.parse(b);  
long t=d.getTime();  
long t1=d1.getTime();  
long t3=t1-t;  
long l1=(24 * 60 * 60 * 1000);  
long l=l1*365;  
long res=t3/l;  
if(res>=60)  
{
al.add(s);  
}
}
catch (Exception e) {  
e.printStackTrace();  
}
}
Collections.sort(al);  
return al;  
}
}
1
5.Kaprekar Number  
Write a program to check whether the given input number is a Kaprekar number or not.  
Note : A positive whole number ‘n’ that has ‘d’ number of digits is squared and split into two pieces, a right-hand piece that  
has ‘d’ digits and a left-hand piece that has remaining ‘d’ or ‘d-1’ digits. If the sum of the two pieces is equal to the number,  
then ‘n’ is a Kaprekar number.  
If its Kaprekar number assign to output variable 1 else -1.  
Example 1:  
Input1:9  
9
^2 = 81, right-hand piece of 81 = 1 and left hand piece of 81 = 8  
Sum = 1 + 8 = 9, i.e. equal to the number. Hence, 9 is a Kaprekar number.  
Example 2:  
Input1:45  
Hint:  
4
5^2 = 2025, right-hand piece of 2025 = 25 and left hand piece of 2025 = 20  
Sum = 25 + 20 = 45, i.e. equal to the number. Hence, 45 is a Kaprekar number."  
Include a class UserMainCode with a static method “getKaprekarNumber” that accepts an integer argument and returns  
an integer. The method returns 1 if the input integer is a Kaprekar number. Else the method returns -1.  
Create a class Main which would get the an Integer as input and call the static method getKaprekarNumber present in the  
UserMainCode.  
Input and Output Format:  
Input consists of an integer.  
Output consists of a single string that is either “Kaprekar Number” or “Not A Kaprekar Number”  
Sample Input 1:  
9
Sample Output 1:  
Kaprekar Number  
Sample Input 2:  
4
5
Sample Output 2:  
Kaprekar Number  
Sample Input 3:  
4
Sample Output 3:  
Not A Kaprekar Number  
import java.util.*;  
public class Main{  
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
int v=UserMainCode.getKaprekarNumber(n);  
if (v==1)  
System.out.println("Kaprekar Number");  
else  
System.out.println("Not a Kaprekar Number");  
}
}
public class UserMainCode {  
public static int getKaprekarNumber(int a)  
{
int count=0,j=0;  
int a1=a;  
while(a1!=0)  
{
count=count+1;  
a1=a1/10;  
}
int square=a*a;  
String s=Integer.toString(square);  
String s1=s.substring(0,count);  
String s2=s.substring(count);  
int x=Integer.parseInt(s1);  
int y=Integer.parseInt(s2);  
int result =x+y;  
if(result==a){  
j=1;  
}
else  
{
j=2;  
}
return j;  
}
}
1
6.Vowels  
Given a String input, write a program to find the word which has the the maximum number of vowels. If two or more words  
have the maximum number of vowels, print the first word.  
Include a class UserMainCode with a static method “storeMaxVowelWord” that accepts a string argument and returns the  
word containing the maximum number of vowels.  
Create a class Main which would get the a String as input and call the static method storeMaxVowelWord present in the  
UserMainCode.  
Input and Output Format:  
Input consists of a string. The string may contain both lower case and upper case letters.  
Output consists of a string.  
Sample Input :  
What is your name?  
Sample Output :  
your  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner sc=new Scanner(System.in);  
String s1 =sc.nextLine();  
UserMainCode.storeMaxVowelWord(s1);  
}
}
import java.util.StringTokenizer;  
public class UserMainCode {  
public static void storeMaxVowelWord(String s1) {  
int i = 0;  
StringTokenizer st = new StringTokenizer(s1," ");  
int len = 0;  
int count = 0;  
int count2 = 0;  
String s6 = null;  
while (st.hasMoreTokens()) {  
String s5 = st.nextToken();  
len = s5.length();  
count=0;  
for (i = 0; i < len; i++) {  
if (s5.charAt(i) == 'a' || s5.charAt(i) == 'e'|| s5.charAt(i) == 'i'  
|
|
| s5.charAt(i) == 'o'|| s5.charAt(i) == 'u'  
|
|s5.charAt(i) == 'A' ||s5.charAt(i) == 'E' ||s5.charAt(i) == 'I'  
|s5.charAt(i) == 'O' ||s5.charAt(i) == 'U')  
count++;  
}
if (count > count2)  
{
count2 = count;  
s6 = s5;  
}
}
System.out.println(s6);  
}
}
1
7.Unique Characters REPEATED  
Given a String as input , write a program to count and print the number of unique characters in it.  
Include a class UserMainCode with a static method “checkUnique” that accepts a String as input and returns the number of  
unique characters in it. If there are no unique characters in the string, the method returns -1.  
Create a class Main which would get a String as input and call the static method checkUnique present in the  
UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of an integer.  
Sample Input 1:  
HOWAREYOU  
Sample Output 1:  
7
(Hint :Unique characters are : H,W,A,R,E,Y,U and other characters are repeating)  
Sample Input 2:  
MAMA  
Sample Output2:  
-
1
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
String s1=sc.next();  
UserMainCode.checkUnique(s1);  
}
}
import java.util.*;  
public class UserMainCode {  
public static void checkUnique(String s1)  
{
String s2=s1.toLowerCase();  
StringBuffer sb=new StringBuffer(s2);  
int l=sb.length();  
int count=0;  
for(int i=0;i<l;i++)  
{
count=0;  
for(int j=i+1;j<l;j++)  
{
if(sb.charAt(i)==sb.charAt(j))  
{
sb.deleteCharAt(j);  
count++;  
j--;  
l--;  
}
}
if(count>0)  
{
sb.deleteCharAt(i);  
i--;  
l--;  
}
}
if(sb.length()==0)  
{
System.out.println(-1);  
}
else  
System.out.println(sb.length());  
}
}
1
8.average of primes  
Write a program to read an array and find average of all elements located at index i, where i is a prime number. Type cast the  
average to an int and return as output. The index starts from 0.  
Include a class UserMainCode with a static method addPrimeIndex which accepts a single integer array. The return type  
(integer) should be the average of all elements located at index i where i is a prime number.  
Create a Class Main which would be used to accept Input array and call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of n+1 integers. The first integer corresponds to n, the number of elements in the array. The next 'n' integers  
correspond to the elements in the array.  
Output consists of a single Integer.  
Refer sample output for formatting specifications.  
Assume that the maximum number of elements in the array is 20 and minimum number of elements is 3.  
Sample Input 1:  
4
2
5
2
4
Sample Output 1:  
3
import java.util.Scanner;  
public class Main{  
public static void main (String[] args)  
{
/
/ your code goes here  
Scanner sc = new Scanner(System.in);  
int n = sc.nextInt();  
System.out.println(UserMainCode.addPrimeIndex(n));  
}
}
import java.util.*;  
public class UserMainCode {  
public static int addPrimeIndex(int n) {  
Scanner sc=new Scanner(System.in);  
int[] a = new int[n];  
for(int i=0;i<n;i++){  
a[i] = sc.nextInt();  
}
int sum=0;  
int count=0;  
int sum_count=0;  
for(int i=0;i<a.length;i++)  
{
count=0;  
for(int j=1;j<=i;j++)  
{
if(i%j==0)  
{
count++;  
}
}
if(count==2)  
{
sum=sum+a[i];  
sum_count++;  
}
}
int avg=sum/sum_count;  
return avg;  
}
}
1
9. ArrayList and Set Operations  
Write a program that performs the following actions:  
1
2
3
4
. Read 2n integers as input & a set operator (of type char).  
. Create two arraylists to store n elements in each arraylist.  
. Write a function performSetOperations which accepts these two arraylist and the set operator as input.  
. The function would perform the following set operations:.  
'
'
'
+' for SET-UNION  
*' for SET-INTERSECTION  
-' for SET-DIFFERENCE  
Refer to sample inputs for more details.  
. Return the resultant arraylist.  
5
Include a class UserMainCode with the static method performSetOperations which accepts two arraylist and returns an  
arraylist.  
Create a Class Main which would be used to read 2n+1 integers and call the static method present in UserMainCode.  
Note:  
-
The index of first element is 0.  
Input and Output Format:  
Input consists of 2n+2 integers. The first integer denotes the size of the arraylist, the next n integers are values to the first  
arraylist, and the next n integers are values to the second arraylist and the last input corresponds to that set operation type.  
Output consists of a modified arraylist as per step 4.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
1
2
3
3
5
7
+
Sample Output 1:  
1
2
3
5
7
Sample Input 2:  
4
1
9
8
7
2
4
6
8
*
0
Sample Output 2:  
8
Sample Input 3:  
4
5
1
1
2
0
1
1
2
-
0
5
0
0
2
0
Sample Output 3:  
5
1
5
Main:  
import java.util.ArrayList;  
import java.util.Scanner;  
public class Main {  
public static void main(String args[]){  
Scanner sc = new Scanner(System.in);  
int n=Integer.parseInt(sc.nextLine());  
ArrayList<Integer>a1=new ArrayList<Integer>();  
ArrayList<Integer>a2=new ArrayList<Integer>();  
for(int i=0;i<n;i++)  
a1.add(Integer.parseInt(sc.nextLine()));  
for(int i=0;i<n;i++)  
a2.add(Integer.parseInt(sc.nextLine()));  
char c=sc.nextLine().charAt(0);  
System.out.println(UserMainCode.performSetOperations(a1,a2,c));  
}
}
UserMainCode:  
import java.util.ArrayList;  
import java.util.ArrayList;  
public class UserMainCode {  
public static ArrayList<Integer>  
performSetOperations(ArrayList<Integer>a1,ArrayList<Integer>a2,char c)  
{
ArrayList<Integer>op1=new ArrayList<Integer>();  
int k=0;  
switch(c)  
{
case '+':  
a1.removeAll(a2);  
a1.addAll(a2);  
op1=a1;  
break;  
case '*':  
a1.retainAll(a2);  
op1=a1;  
break;  
case '-':  
for(int i=0;i<a1.size();i++)  
{
k=0;  
for(int j=0;j<a2.size();j++)  
{
if(a1.get(i)==a2.get(j))  
k=1;  
}
if(k==0)  
op1.add(a1.get(i));  
}
break;  
}
return op1;  
}}  
}
return tm;  
}
}
2
0.Largest Span  
Write a program to read an array and find the size of largest span in the given array  
""span"" is the number of elements between two repeated numbers including both numbers. An array with single element  
has a span of 1.  
.
Include a class UserMainCode with a static method getMaxSpan which accepts a single integer array. The return type  
(integer) should be the size of largest span.  
Create a Class Main which would be used to accept Input array and call the static method present in UserMainCode.  
Input and Output Format:  
Input consists of n+1 integers. The first integer corresponds to n, the number of elements in the array. The next 'n' integers  
correspond to the elements in the array.  
Output consists of a single Integer.  
Refer sample output for formatting specifications.  
Assume that the maximum number of elements in the array is 20.  
Sample Input 1:  
5
1
2
1
1
3
Sample Output 1:  
4
Sample Input 2:  
7
1
4
2
1
4
1
5
Sample Output 2:  
6
MAIN:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
int []a=new int[n];  
for(int i=0;i<n;i++)  
{
a[i]=sc.nextInt();  
}
System.out.print(UserMainCode.getMaxSpan(a,n));  
}
}
USERMAINCODE:  
class UserMainCode {  
public static int getMaxSpan(int[] x,int n)  
{
int gap=0,max=0;  
for(int i=0;i<n;i++)  
{
for(int j=i+1;j<n;j++)  
{
if(x[i]==x[j])  
gap=j;  
}
if(gap-i>max)  
max=gap-i;  
}
return max+1;  
}
}
2
1. Max Scorer  
Write a program that performs the following actions:  
. Read n strings as input and stores them as an arraylist. The string consists of student  
information like name and obtained marks of three subjects. Eg: name-mark1-mark2-mark3  
suresh-70-47-12]. The mark would range between 0 – 100 (inclusive).  
. Write a function highestScorer which accepts these arraylist and returns the name of the  
1
[
2
student who has scored the max marks. Assume the result will have only one student with  
max mark.  
Include a class UserMainCode with the static method highestScorer which accepts the  
arraylist and returns the name  
(
string) of max scorer.  
Create a Class Main which would be used to read n strings into arraylist and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of 1 integer and n strings. The first integer denotes the size of the arraylist,  
the next n strings are score pattern described above.  
Output consists of a string with the name of the top scorer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
3
sunil-56-88-23  
bindul-88-70-10  
john-70-49-65  
Sample Output 1:  
John  
USERMAINCODE:  
import java.util.ArrayList;  
import java.util.StringTokenizer;  
public class UserMainCode  
{
public static String highestScorer(ArrayList<String>s1)  
{
int max=0;  
String s4=null;  
for(int i=0;i<s1.size();i++)  
{
String s2=s1.get(i);  
StringTokenizer t=new StringTokenizer(s2,"-");  
String s3=t.nextToken();  
int n1=Integer.parseInt(t.nextToken());  
int n2=Integer.parseInt(t.nextToken());  
int n3=Integer.parseInt(t.nextToken());  
int n=n1+n2+n3;  
if(n>max)  
{
max=n;  
s4=s3;  
}
}
return s4;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
/ TODO Auto-generated method stub  
/
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
ArrayList<String> s1=new ArrayList<String>();  
for(int i=0;i<n;i++)  
{
s1.add(s.next());  
}
System.out.println(UserMainCode.highestScorer(s1));  
s.close();  
}
}
22. Max Vowels  
Write a Program which fetches the word with maximum number of vowels. Your program  
should read a sentence as input from user and return the word with max number of vowels.  
In case there are two words of maximum length return the word which comes first in the  
sentence.  
Include a class UserMainCode with a static method getWordWithMaximumVowels which  
accepts a string The return type is the longest word of type string.  
Create a Class Main which would be used to accept two Input strings and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string with maximum size of 100 characters.  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
Appreciation is the best way to motivate  
Sample Output 1:  
Appreciation  
USERMAINCODE:  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static String getWordWithMaximumVowels(String s1)  
{
int i;  
StringTokenizer t=new StringTokenizer(s1," ");  
int count=0,max=0;  
String s2=null;  
while(t.hasMoreTokens())  
{
String s3=t.nextToken();  
count=0;  
for(i=0;i<s3.length();i++)  
{
if(s3.charAt(i)=='a'||s3.charAt(i)=='e'||s3.charAt(i)=='i'||s3.charAt(i)=='  
o'||s3.charAt(i)=='u'  
|
|s3.charAt(i)=='A'||s3.charAt(i)=='E'||s3.charAt(i)=='I'||s3.charAt(i)=='O  
'
||s3.charAt(i)=='U')  
count++;  
}
if(count>max)  
{
max=count;  
s2=s3;  
}
}
return s2;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
/ TODO Auto-generated method stub  
/
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
System.out.println(UserMainCode.getWordWithMaximumVowels(s1));  
s.close();  
}
}
23. All Vowels  
Write a Program to check if given word contains exactly five vowels and the vowels are in  
alphabetical order. Return 1 if the condition is satisfied else return -1. Assume there is no  
repetition of any vowel in the given string and all letters are in lower case.  
Include a class UserMainCode with a static method testOrderVowels which accepts a string  
The return type is integer based on the condition stated above.  
Create a Class Main which would be used to accept two Input strings and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string with maximum size of 100 characters.  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
acebisouzz  
Sample Output 1:  
valid  
Sample Input 2:  
Alphabet  
Sample Output 2:  
Invalid  
USERMAINCODE:  
public class UserMainCode {  
public static int getOrderVowels(String s1)  
{
String s2="aeiou";  
StringBuffer sb=new StringBuffer();  
for(int i=0;i<s1.length();i++)  
{
for(int j=0;j<s2.length();j++)  
{
if(s1.charAt(i)==s2.charAt(j))  
{
sb.append(s1.charAt(i));  
}
}
}
if(sb.toString().equals(s2))  
{
return 1;  
}
return -1;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
/
/ TODO Auto-generated method stub  
Scanner s=new Scanner(System.in);  
String s1=s.next();  
int b=UserMainCode.getOrderVowels(s1);  
if(b==1)  
{
System.out.println("Valid");  
}
else  
System.out.println("Invalid");  
s.close();  
}
}
2
4. Adjacent Swaps  
Write a Program that accepts a string as a parameter and returns the string with each pair of  
adjacent letters reversed. If the string has an odd number of letters, the last letter is  
unchanged.  
Include a class UserMainCode with a static method swapPairs which accepts a string. The  
return type is string which is reversed pair of letters.  
Create a Class Main which would be used to accept two Input strings and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string with maximum size of 100 characters.  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
forget  
Sample Output 1:  
ofgrte  
Sample Input 2:  
New York  
Sample Output 2:  
eN woYkr  
USERMAINCODE:  
import java.util.*;  
public class UserMainCode {  
public static String swapPairs(String s1)  
{
int i;  
StringBuffer sb=new StringBuffer();  
for(i=0;i<s1.length()-1;i=i+2)  
{
if(i%2==0)  
{
char a=s1.charAt(i);  
char b=s1.charAt(i+1);  
sb.append(b).append(a);  
}
else  
for(i=0;i<s1.length()-1;i=i+2)  
{
char a=s1.charAt(i);  
char b=s1.charAt(i+1);  
sb.append(b).append(a);  
sb.append(s1.charAt(s1.length()-1));  
}
}
return sb.toString();  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
/ TODO Auto-generated method stub  
/
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
System.out.println(UserMainCode.swapPairs(s1));  
s.close();  
}
}
2
5. Sum of Digits  
Write a Program that accepts a word as a parameter, extracts the digits within the string  
and returns its sum.  
Include a class UserMainCode with a static method getdigits which accepts a string. The  
return type is integer representing the sum.  
Create a Class Main which would be used to accept the input string and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of a string with maximum size of 100 characters.  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
abc12de4  
Sample Output 1:  
7
USERMAINCODE:  
public class UserMainCode {  
public static int getDigits(String s1)  
{
int sum=0;  
for(int i=0;i<s1.length();i++)  
{
char a=s1.charAt(i);  
if(Character.isDigit(a))  
{
int b=Integer.parseInt(String.valueOf(a));  
sum=sum+b;  
}
}
return sum;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
/ TODO Auto-generated method stub  
/
Scanner s=new Scanner(System.in);  
String s1=s.next();  
System.out.println(UserMainCode.getDigits(s1));  
s.close();  
}
}
2
6. Password  
Given a String , write a program to find whether it is a valid password or not.  
Validation Rule:  
Atleast 8 characters  
Atleast 1 number(1,2,3...)  
Atleast 1 special character(@,#,%...)  
Atleast 1 alphabet(a,B...)  
Include a class UserMainCode with a static method “validatePassword” that accepts a String argument and returns a  
boolean value. The method returns true if the password is acceptable. Else the method returns false.  
Create a class Main which would get a String as input and call the static method validatePassword present in the  
UserMainCode.  
Input and Output Format:  
Input consists of a String.  
Output consists of a String that is either “Valid” or “Invalid”.  
Sample Input 1:  
cts@1010  
Sample Output 1:  
Valid  
Sample Input 2:  
punitha3  
Sample Output 2:  
Invalid  
USERMAINCODE:  
public class UserMainCode {  
public static boolean validatePassword(String s1)  
{
boolean b=false;  
if(s1.length()>=8)  
b=true;  
if(b=true)  
{
if(s1.matches(".*[0-9]{1,}.*")&&s1.matches(".*[a-zA-Z]{1,}.*")&&s1.matches(".*[@#%]{1,}.*"))  
{
b=true;  
}
else  
b=false;  
}
return b;  
}
}
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String [] args)  
{
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
boolean b=(UserMainCode.validatePassword(s1));  
if(b==true)  
{
System.out.println("Valid");  
}
else  
System.out.println("Invalid");  
s.close();  
}
}
2
7. Employee Bonus  
A Company wants to give away bonus to its employees. You have been assigned as the programmer to automate this  
process. You would like to showcase your skills by creating a quick prototype. The prototype consists of the following steps:  
1
. Read Employee details from the User. The details would include id, DOB (date of birth) and salary in the given  
order. The datatype for id is integer, DOB is string and salary is integer.  
. You decide to build two hashmaps. The first hashmap contains employee id as key and DOB as value, and the  
second hashmap contains same employee ids as key and salary as value.  
. If the age of the employee in the range of 25 to 30 years (inclusive), the employee should get bonus of 20% of his  
2
3
salary and in the range of 31 to 60 years (inclusive) should get 30% of his salary. store the result in TreeMap in  
which Employee ID as key and revised salary as value. Assume the age is caculated based on the date 01-09-2014.  
(Typecast the bonus to integer).  
4
. Other Rules:  
a. If Salary is less than 5000 store -100.  
b. If the age is less than 25 or greater than 60 store -200.  
c. a takes more priority than b i.e both if a and b are true then store -100.  
5
. You decide to write a function calculateRevisedSalary which takes the above hashmaps as input and returns the  
treemap as output. Include this function in class UserMainCode.  
Create a Class Main which would be used to read employee details in step 1 and build the two hashmaps. Call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of employee details. The first number indicates the size of the employees. The next three values indicate the  
employee id, employee DOB and employee salary. The Employee DOB format is “dd-mm-yyyy”  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
2
1
2
1
2
0
1
010  
0-12-1987  
0000  
020  
1-01-1985  
4400  
Sample Output 1:  
1
1
2
1
010  
2000  
020  
7280  
USERMAINCODE:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.ArrayList;  
import java.util.Date;  
import java.util.Iterator;  
import java.util.LinkedHashMap;  
import java.util.TreeMap;  
class UserMainCode {  
public static TreeMap<Integer,Integer>  
calculateRevisedSalary(LinkedHashMap<Integer,String>a1,LinkedHashMap<Integer,Integer>a2) throws  
ParseException  
{
TreeMap<Integer,Integer>ans=new TreeMap<Integer,Integer>();  
ArrayList<String>al=new ArrayList<String>();  
Iterator <Integer>it=a1.keySet().iterator();  
while(it.hasNext())  
{
int s=it.next();  
String s1=a1.get(s);  
SimpleDateFormat sdf=new SimpleDateFormat("dd-MM-yyyy");  
sdf.setLenient(false);  
try{  
Date d=new Date();  
Date d1=new Date();  
String a=s1;  
String b="01-09-2014";  
d=sdf.parse(a);  
d1=sdf.parse(b);  
long t=d.getTime();  
long t1=d1.getTime();  
long t3=t1-t;  
long l1=(24 * 60 * 60 * 1000);  
long l=l1*365;  
long res=t3/l;  
/
/System.out.println("Result="+res);  
if(res>=25 && res<=30)  
{
float bonus=(float)((0.2*a2.get(s))+a2.get(s));  
int r=(int)bonus;  
ans.put(s,r );  
}
{
else if(res>30 && res<=60)  
float bonus=(float)((0.3*a2.get(s))+a2.get(s));  
int r=(int)bonus;  
ans.put(s,r );  
}
else if(a2.get(s)<5000)  
{
ans.put(s, -100);  
}
else if(res<25 ||res>60)  
{
ans.put(s, -200);  
}
}
catch (Exception e) {  
e.printStackTrace();  
}
}
return ans;  
}
}
MAIN:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.ArrayList;  
import java.util.Date;  
import java.util.Iterator;  
import java.util.LinkedHashMap;  
import java.util.Scanner;  
import java.util.TreeMap;  
public class Main  
{
public static void main(String args[]) throws ParseException{  
Scanner sc=new Scanner(System.in);  
int n=sc.nextInt();  
LinkedHashMap<Integer,String>a1=new LinkedHashMap<Integer,String>();  
LinkedHashMap<Integer,Integer>a2=new LinkedHashMap<Integer,Integer>();  
TreeMap<Integer,Integer>ans=new TreeMap<Integer, Integer>();  
for(int i=0;i<n;i++)  
int id=sc.nextInt();  
{
a1.put(id,sc.next());  
int salary=sc.nextInt();  
a2.put(id,salary);  
}
ans=UserMainCode.calculateRevisedSalary(a1,a2);  
Iterator <Integer>it=ans.keySet().iterator();  
while(it.hasNext())  
{
int a=it.next();  
int b=ans.get(a);  
System.out.println(a);  
System.out.println(b);  
}
}
}
2
8. Grade Calculator REFER 53 FROM LEVEL2  
A School wants to assign grades to its students based on their marks. You have been assigned as the programmer to  
automate this process. You would like to showcase your skills by creating a quick prototype. The prototype consists of the  
following steps:  
1
. Read student details from the User. The details would include roll no, mark in the given order. The datatype for id  
is integer, mark is integer.  
2
3
1
2
3
. You decide to build a hashmap. The hashmap contains roll no as key and mark as value.  
. BUSINESS RULE:  
. If Mark is greater than or equal to 80 store medal as ""GOLD"".  
. If Mark is less then to 80 and greater than or equal to 60 store medal as ""SILVER"".  
.If Mark is less then to 60 and greater than or equal to 45 store medal as ""BRONZE"" else store ""FAIL"".  
Store the result in TreeMap in which Roll No as Key and grade as value.  
. You decide to write a function calculateGrade which takes the above hashmaps as input and returns the treemap as  
4
output. Include this function in class UserMainCode.  
Create a Class Main which would be used to read employee details in step 1 and build the two hashmaps. Call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of employee details. The first number indicates the size of the students. The next two values indicate the roll  
id, mark.  
Output consists of a single string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
2
1
8
1
4
010  
0
00  
0
Sample Output 1:  
00  
FAIL  
010  
1
1
GOLD  
USERMAINCODE:  
import java.util.Iterator;  
import java.util.HashMap;  
import java.util.TreeMap;  
public class UserMainCode  
{
public static TreeMap<Integer,String>calculateGrade(HashMap<Integer,Integer>hm)  
{
TreeMap<Integer,String>tm=new TreeMap<Integer,String>();  
Iterator<Integer> it=hm.keySet().iterator();  
while(it.hasNext())  
{
int id=it.next();  
int mark=hm.get(id);  
if(mark>=80)  
tm.put(id,"GOLD");  
else if(mark<80 && mark>=60)  
tm.put(id,"SILVER");  
else if(mark<60 && mark>=45)  
tm.put(id,"BRONZE");  
else  
tm.put(id,"FAIL");  
}
return tm;  
}
}
MAIN:  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.HashMap;  
import java.util.TreeMap;  
import java.util.Scanner;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
int s=sc.nextInt();  
HashMap<Integer,Integer>hm=new HashMap<Integer,Integer>();  
for(int i=0;i<s;i++)  
{
hm.put(sc.nextInt(),sc.nextInt());  
}
TreeMap<Integer,String>tm=new TreeMap<Integer,String>();  
tm=UserMainCode.calculateGrade(hm);  
Iterator<Integer> it=tm.keySet().iterator();  
for(int i=0;i<s;i++)  
{
int n=it.next();  
String fac=tm.get(n);  
System.out.println(n);  
System.out.println(fac);  
}
}
}
2
9.Digits - II  
Write a program to read a non-negative integer n, compute the sum of its digits. If sum is  
greater than 9 repeat the process and calculate the sum once again until the final sum comes  
to single digit.Return the single digit. Include a class UserMainCode with a static method  
getDigitSum which accepts the integer value. The return type is integer. Create a Class Main  
which would be used to accept the string and call the static method present in UserMainCode.  
Input and Output Format: Input consists of a integer. Output consists of integer. Refer sample  
output for formatting specifications.  
Sample Input 1: 9999 Sample Output 1: 9  
Sample Input 2: 698 Sample Output 2: 5  
MAIN:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int a=s.nextInt();  
int sum=UserMainCode.getDigitSum(a);  
System.out.println(sum);  
}
}
USERMAINCODE:  
public class UserMainCode  
{
public static int getDigitSum(int n)  
{
int sum = 0 ;  
int n1=n;  
while(n>10)  
{
int a = 0 ; sum = 0;  
while(n!=0)  
{
a = n%10;  
sum+=a;  
n=n/10;  
}
n=sum;  
}
return sum;  
}
}
3
0.Anagrams  
Write a program to read two strings and checks if one is an anagram of the other. An anagram  
is a word or a phrase that can be created by rearranging the letters of another given word or  
phrase. We ignore white spaces and letter case. All letters of 'Desperation' can be rearranged  
to the phrase 'A Rope Ends It'. Include a class UserMainCode with a static method  
checkAnagram which accepts the two strings. The return type is boolean which is TRUE /  
FALSE. Create a Class Main which would be used to accept the two strings and call the static  
method present in UserMainCode.  
Input and Output Format: Input consists of two strings. Output consists of TRUE / FALSE.  
Refer sample output for formatting specifications. Sample Input 1: tea eat Sample Output 1:  
TRUE  
Sample Input 2: Desperation A Rope Ends It Sample Output 2: TRUE  
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args){  
Scanner s=new Scanner(System.in);  
String s1=s.nextLine();  
String s2=s.nextLine();  
System.out.println(UserMainCode.checkAnagram(s1,s2));  
}
}
USERMAINCODE:  
import java.util.*;  
import java.text.*;  
public class UserMainCode {  
public static boolean checkAnagram(String s1,String s2)  
{
boolean b=false;  
String aj1 =s1.toLowerCase();  
String aj2=s2.toLowerCase();  
//ANAGRAMS  
ArrayList<Character> a1 = new ArrayList<Character>();  
ArrayList<Character> a2 = new ArrayList<Character>();  
for(int i=0;i<aj1.length();i++)  
{
char c=aj1.charAt(i);  
if(c!=' ')  
{
a1.add(c);  
}
}
for(int j=0;j<aj2.length();j++)  
{
char c=aj2.charAt(j);  
if(c!=' ')  
{
a2.add(c);  
}
}
if(a1.size()==a2.size())  
{
if(a1.containsAll(a2))  
{
b= true;  
}
}
return b;  
}
}
3
1.Shift Left  
Write a program to read a integer array of scores, and return a version of the given array  
where all the 5's have been removed. The remaining elements should shift left towards the  
start of the array as needed,  
and the empty spaces at the end of the array should be filled with 0.  
So {1, 5, 5, 2} yields {1, 2, 0, 0}.  
Include a class UserMainCode with a static method shiftLeft which accepts the integer array.  
The return type is modified array.  
Create a Class Main which would be used to accept the integer array and call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of an integer n which is the number of elements followed by n integer values.  
Output consists of modified array.  
Refer sample output for formatting specifications.  
Sample Input 1: 7 1 5 2 4 5 3 5  
Sample Output 1: 1 2 4 3 0 0 0  
MAIN:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner sc=new Scanner(System.in);  
int size=sc.nextInt();  
int[]m=new int[size];  
int[]n=new int[size];  
for(int i=0;i<size;i++)  
{
n[i]=sc.nextInt();  
}
m=UserMainCode.shiftLeft(n);  
for(int i=0;i<size;i++)  
{
System.out.println(m[i]);  
}
}
}
USERMAINCODE:  
public class UserMainCode {  
public static int[] shiftLeft(int n[])  
{
int j=0;  
int[]m=new int[n.length];  
for(int i=0;i<n.length;i++)  
{
if(n[i]!=5)  
{
m[j]=n[i];  
j++;  
}
}
return m;  
}
}
3
2.Word Count  
Given a string array (s) with each element in the array containing alphabets or digits. Write a  
program to add all the digits in every string and return the sum as an integer. If two digits  
appear simultaneously do not consider it as one number. Ex- For 'Hyderabad 21' consider 2  
and 1 as two digits instead of 21 as a number.  
Include a class UserMainCode with a static method sumOfDigits which accepts the string  
array. The return type is the integer formed based on rules. Create a Class Main which would  
be used to accept the string and integer and call the static method present in UserMainCode.  
Input and Output Format: Input consists of a an integer indicating the number of elements in  
the string array. Output consists of a integer . Refer sample output for formatting  
specifications.  
Sample Input 1: 5 AAA1  
B2B 4CCC A5 ABCDE Sample Output 1: 12  
Sample Input 2: 3 12 C23 5CR2 Sample Output 2: 15  
MAIN:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
String a[]=new String[n];  
for(int i=0;i<n;i++)  
{
a[i]=s.next();  
}
System.out.println(UserMainCode.sumOfDigits(a));  
}
}
USERMAINCODE:  
public class UserMainCode {  
public static int sumOfDigits(String[] s1)  
{
int sum = 0;  
for(int i=0;i<s1.length;i++)  
{
String s = s1[i];  
for(int j = 0;j<s.length();j++)  
{
Character c = s.charAt(j);  
if(Character.isDigit(c))  
{
sum+=Integer.parseInt(s.valueOf(c));  
}
}
}
return sum;  
}
}
3
3.Prefix Finder  
Given a string array (s) with each element in the array containing 0s and 1s. Write a program  
to get the number of strings in the array where one String is getting as prefixed in other String  
in that array . Example 1: Input: {10,101010,10001,1111} Output =2 (Since 10 is a prefix of  
1
0
01010 and 10001) Example 2: Input: {010,1010,01,0111,10,10} Output =3(01 is a prefix of  
10 and 0111. Also, 10 is a prefix of 1010) Note: 10 is NOT a prefix for 10.  
Include a class UserMainCode with a static method findPrefix which accepts the string array.  
The return type is the integer formed based on rules. Create a Class Main which would be  
used to accept the string and integer and call the static method present in UserMainCode.  
Input and Output Format: Input consists of a an integer indicating the number of elements in  
the string array followed by the array. Output consists of a integer . Refer sample output for  
formatting specifications.  
Sample Input 1: 4 0 1 11 110 Sample Output 1: 3  
MAIN:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner sc = new Scanner(System.in);  
int n=Integer.parseInt(sc.nextLine());  
String s[]=new String[n];  
for(int i=0;i<n;i++)  
s[i]=sc.nextLine();  
System.out.println(UserMainCode.findPrefix(s));  
}
}
USERMAINCODE:  
import java.util.ArrayList;  
import java.util.Iterator;  
import java.util.LinkedHashSet;  
public class UserMainCode  
{
public static int findPrefix (String s[]) {  
LinkedHashSet<String>l1=new LinkedHashSet<String>();  
ArrayList<String>a1=new ArrayList<String>();  
int c=0;  
for(int i=0;i<s.length;i++)  
l1.add(s[i]);  
Iterator<String> it=l1.iterator();  
while(it.hasNext())  
{
a1.add(it.next());  
}
for(int i=0;i<a1.size();i++)  
{
String s2=a1.get(i);  
for(int j=0;j<a1.size();j++)  
{
String s3=a1.get(j);  
if(i!=j&&s3.length()>s2.length())  
{
String s4=s3.substring(0,s2.length());  
if(s2.equals(s4))  
c++;  
}
}
}
return c;  
}
}
3
4.Commons  
Given two arrays of strings,return the count of strings which is common in both arrays.  
Duplicate entries are counted only once. Include a class UserMainCode with a static method  
countCommonStrings which accepts the string arrays. The return type is the integer formed  
based on rules. Create a Class Main which would be used to accept the string arrays and  
integer and call the static method present in UserMainCode.  
Input and Output Format: Input consists of a an integer indicating the number of elements in  
the string array followed by the array. Output consists of a integer . Refer sample output for  
formatting specifications.  
Sample Input 1: 3 a c e 3 b d e Sample Output 1: 1  
Sample Input 2: 5 ba ba black sheep wool 5 ba ba have any wool Sample Output 2: 2  
MAIN:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) {  
Scanner sc = new Scanner(System.in);  
int n1 = sc.nextInt();  
String[] s1 = new String[n1];  
for (int i = 0; i < n1; i++) {  
s1[i] = sc.next();  
}
int n2 = sc.nextInt();  
String[] s2 = new String[n2];  
for (int i = 0; i < n2; i++) {  
s2[i] = sc.next();  
}
System.out.println(UserMainCode.countCommonStrings(s1,s2));  
}
}
USERMAINCODE:  
import java.util.ArrayList;  
public class UserMainCode {  
public static int countCommonStrings(String[] s1,String[] s2)  
{
int count=0;  
ArrayList<String> al = new ArrayList<String>();  
for (int i = 0; i < s1.length; i++) {  
for (int j = 0; j < s2.length; j++) {  
if(s1[i].equals(s2[j])){  
if(!al.contains(s1[i])){  
count++;  
al.add(s1[i]);  
}
}
}
}
return count;  
}
}
3
5.Sequence Sum  
Write a program to read a non-negative integer n, and find sum of fibonanci series for n  
number..  
Include a class UserMainCode with a static method getFibonacciSum which accepts the  
integer value. The return type is integer.  
The fibonacci seqence is a famous bit of mathematics, and it happens to have a recursive  
definition.  
The first two values in the sequnce are 0 and 1.  
Each subsequent value is the sum of the previous two values, so the whole seqence is  
0
,1,1,2,3,5 and so on.  
You will have to find the sum of the numbers of the Fibonaaci series for a given int n.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a integer.  
Output consists of integer.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
Sample Output 1:  
7
MAIN:  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args)  
{
Scanner s=new Scanner(System.in);  
int n=s.nextInt();  
System.out.println(UserMainCode.getFibonacciSum(n));  
}
}
USERMAINCODE:  
import java.util.ArrayList;  
import java.util.Scanner;  
public class UserMainCode {  
public static int getFibonacciSum(int n){  
int a=0,b=1,c=0,d=1;  
for(int i=3;i<=n;i++){  
c=a+b;  
a=b; b=c;  
d=d+c;  
}
return d;  
}
}
3
6.E-Mail Validation  
Write a program to read a string and validate the given email-id as input. Validation Rules: 1.  
Ensure that there are atleast 5 characters between '@' and '.' 2. There should be only one '.'  
and one '@' symbol. 3. The '.' should be after the '@' symbol. 4. There must be atleast three  
characters before '@'. 5. The string after '.' should only be 'com'  
Include a class UserMainCode with a static method ValidateEmail which accepts the string.  
The return type is TRUE / FALSE as per problem. Create a Class Main which would be used  
to accept the string and call the static method present in UserMainCode.  
Input and Output Format: Input consists of a string. Output consists of TRUE / FALSE. Refer  
sample output for formatting specifications.  
Sample Input 1: test@gmail.com Sample Output 1: TRUE  
Sample Input 2: academy@xyz.com Sample Output 2: FALSE  
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s=new Scanner(System.in);  
String ip;  
ip=s.next();  
boolean b=UserMainCode.ValidateEmail(ip);  
if(b==true)  
System.out.println("TRUE");  
else  
System.out.println("FALSE");  
}
}
USERMAINCODE:  
import java.util.StringTokenizer;  
public class UserMainCode {  
public static boolean ValidateEmail(String ip) {  
int i=0;  
boolean b=false;  
StringTokenizer t=new StringTokenizer(ip,"@");  
String s1=t.nextToken();  
String s2=t.nextToken();  
StringTokenizer t1=new StringTokenizer(s2,".");  
String s3=t1.nextToken();  
String s4=t1.nextToken();  
if(ip.contains("@") && ip.contains("."))  
i++;  
if(i==1)  
if(s3.length()==5)  
if(s1.length()>=3)  
if(s4.equals("com"))  
b=true;  
return b;  
}
}
3
7.Symmetric Difference  
Write a program to read two integer array and calculate the symmetric difference of the two  
arrays. Finally Sort the array.  
Symmetric difference is the difference of A Union B and A Intersection B ie. [ (A U B) - (A ^  
B)]  
Union operation merges the two arrays and makes sure that common elements appear only  
once. Intersection operation  
includes common elements from both the arrays.  
Ex - A={12,24,7,36,14} and B={11,26,7,14}.  
A U B ={ 7,11,12,14,24,26,36} and  
A ^ B = {7,14}  
Symmetric difference of A and B after sorting= [A U B] - [ A ^ B] = {11,12,24,26,36}.  
Include a class UserMainCode with a static method getSymmetricDifference which accepts  
the integer array. The return  
type is an integer array.  
Create a Class Main which would be used to accept the two integer arrays and call the static  
method present in  
UserMainCode.  
Input and Output Format:  
Input consists of an integer n which is the number of elements followed by n integer values.  
The same sequnce is followed  
for the next array.  
Output consists of sorted symmetric difference array.  
Refer sample output for formatting specifications.  
Sample Input 1:  
5
1
5
1
2
3
3
5
3
1
1
4
6
Sample Output 1:  
1
1
1
1
4
2
6
MAIN:  
import java.util.*;  
public class Main  
{
public static void main(String[] args)  
{
int n,m;  
Scanner sin = new Scanner(System.in);  
n = sin.nextInt();  
int[] a1 = new int[n];  
for(int i=0;i<n;i++)  
{
a1[i] = sin.nextInt();  
}
m = sin.nextInt();  
int[] a2 = new int[m];  
for(int i=0;i<m;i++)  
{
a2[i] = sin.nextInt();  
}
int[] result = UserMainCode.getSymmetricDifference (a1,a2);  
for(int i=0;i<result.length;i++)  
System.out.println(result[i]);  
}
}
USERMAINCODE:  
import java.util.*;  
public class UserMainCode  
{
public static int[] getSymmetricDifference (int[] a1,int[] a2)  
{
/
/
/int[] a1 = new int[]{11,5,14,26,3};  
/int[] a2 = new int[]{5,3,1};  
int[] union,inter,result;  
int count=0;  
int max = a1.length+a2.length;  
ArrayList<Integer> temp = new ArrayList<Integer>(max);  
/
*union*/  
for(int i=0;i<a1.length;i++)  
{
if(!temp.contains(a1[i]))  
{
+
+count;  
temp.add(a1[i]);  
}
}
for(int i=0;i<a2.length;i++)  
{
if(!temp.contains(a2[i]))  
{
+
+count;  
temp.add(a2[i]);  
}
}
union = new int[count];  
for(int i=0;i<count;i++)  
{
union[i] = (int)temp.get(i);  
}
Arrays.sort(union);  
/
*intersection*/  
temp = new ArrayList<Integer>(max);  
count =0;  
Arrays.sort(a2);  
for(int i=0;i<a1.length;i++)  
{
if(Arrays.binarySearch(a2,a1[i]) >= 0)  
{
+
+count;  
temp.add(a1[i]);  
}
}
inter = new int[count];  
for(int i=0;i<count;i++)  
{
inter[i] = (int)temp.get(i);  
}
Arrays.sort(inter);  
/
*difference */  
temp = new ArrayList<Integer>(max);  
count =0;  
Arrays.sort(inter);  
for(int i=0;i<union.length;i++)  
{
if(Arrays.binarySearch(inter,union[i]) < 0)  
{
+
+count;  
temp.add(union[i]);  
}
}
result = new int[count];  
for(int i=0;i<count;i++)  
{
result[i] = (int)temp.get(i);  
}
Arrays.sort(result);  
/
/System.out.println("resultant array : \n "+Arrays.toString(result));  
return result;  
}
}
3
8.Day of Week  
Write a program to read a string containing date in DD/MM/YYYY format and prints the day  
of the week that date falls on.  
Return the day in lowercase letter (Ex: monday)  
Include a class UserMainCode with a static method getDayOfWeek which accepts the string.  
The return type is the string.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
0
2/04/1985  
Sample Output 1:  
Tuesday  
MAIN:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.Date;  
import java.util.Scanner;  
public class Main {  
public static void main(String[] args) throws ParseException {  
Scanner sc=new Scanner(System.in);  
String s1=sc.nextLine();  
System.out.println(UserMainCode.getDayofWeek(s1));  
}
}
USERMAINCODE:  
import java.text.SimpleDateFormat;  
import java.text.ParseException;  
import java.util.Date;  
public class UserMainCode {  
public static String getDayofWeek(String s1) throws ParseException  
{
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
SimpleDateFormat sdf1=new SimpleDateFormat("EEEEE");  
Date d=sdf.parse(s1);  
String s=sdf1.format(d);  
return s.toLowerCase();  
}
}
3
9.Add Time  
Write a program to read two String variables containing time intervals in hh:mm:ss format.  
Add the two time intervals and  
return a string in days:hours:minutes:seconds format where DD is number of days.  
Hint: Maximum value for hh:mm:ss is 23:59:59  
Include a class UserMainCode with a static method addTime which accepts the string values.  
The return type is the string.  
Create a Class Main which would be used to accept the two string values and call the static  
method present in  
UserMainCode.  
Input and Output Format:  
Input consists of two string.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
1
1
2:45:30  
3:50:45  
Sample Output 1:  
:2:36:15  
Sample Input 2:  
1
2
2
3:59:59  
3:59:59  
Sample Output 2:  
1
:23:59:58  
MAIN:  
import java.util.*;  
import java.io.IOException;  
import java.text.*;  
public class Main {  
public static void main(String[] args) throws IOException, ParseException {  
Scanner s = new Scanner(System.in);  
String s1=s.next();  
String s2=s.next();  
System.out.println(UserMainCode.addTime(s1,s2));  
}
}
USERMAINCODE:  
import java.util.*;  
import java.io.IOException;  
import java.text.*;  
public class UserMainCode {  
public static String addTime(String s1,String s2) throws IOException,  
ParseException{  
SimpleDateFormat sdf=new SimpleDateFormat("HH:mm:ss");  
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));  
sdf.setTimeZone(TimeZone.getTimeZone("s1"));  
sdf.setTimeZone(TimeZone.getTimeZone("s2"));  
Date d1=sdf.parse(s1);  
Date d2=sdf.parse(s2);  
long add=d1.getTime()+d2.getTime();  
String s=sdf.format(add);  
Calendar cal=Calendar.getInstance();  
cal.setTime(sdf.parse(s));  
int FindDay=cal.get(Calendar.DAY_OF_MONTH);  
if(FindDay>1)  
FindDay=FindDay-1;  
String op=FindDay+":"+s;  
return op;  
}
}
4
0.ISBN Validation  
Write a program to read a string and validate the given ISBN as input.  
Validation Rules:  
1
. An ISBN (International Standard Book Number) is a ten digit code which uniquely  
identifies a book.  
2
8
. To verify an ISBN you calculate 10 times the first digit, plus 9 times the second digit, plus  
times the third ..all the way  
until you add 1 times the last digit.  
If the final number leaves no remainder when divided by 11 the code is a valid ISBN.  
Example 1:  
Input:0201103311  
Calculation: 10*0 + 9*2 + 8*0 + 7*1 + 6*1 + 5*0 + 4*3 + 3*3 + 2*1 + 1*1 = 55.  
5
5 mod 11 = 0  
Hence the input is a valid ISBN number  
Output: true  
Include a class UserMainCode with a static method validateISBN which accepts the string.  
The return type is TRUE /  
FALSE as per problem.  
Create a Class Main which would be used to accept the string and call the static method  
present in UserMainCode.  
Input and Output Format:  
Input consists of a string.  
Output consists of TRUE / FALSE.  
Refer sample output for formatting specifications.  
Sample Input 1:  
0
201103311  
Sample Output 1:  
TRUE  
MAIN:  
import java.util.*;  
public class Main {  
public static void main(String[] args) {  
Scanner s = new Scanner(System.in);  
String ip=s.next();  
System.out.println(UserMainCode.ISBNnumber(ip));  
}
}
USERMAINCODE:  
import java.util.*;  
import java.text.*;  
public class UserMainCode {  
public static String ISBNnumber(String ip) {  
String b="FALSE";  
int sum=0;  
for(int i=0,j=ip.length();i<ip.length();i++,j--){  
String s=String.valueOf(ip.charAt(i));  
int n=Integer.parseInt(s);  
sum+=(n*j); }  
/
/System.out.println(sum);  
if(sum%11==0)  
b="TRUE";  
return b;  
}
}
4
1.Date Format  
Write a program to read two String variables in DD-MM-YYYY.Compare the two dates and  
return the older date in  
'MM/DD/YYYY' format.  
Include a class UserMainCode with a static method findOldDate which accepts the string  
values. The return type is the  
string.  
Create a Class Main which would be used to accept the two string values and call the static  
method present in  
UserMainCode.  
Input and Output Format:  
Input consists of two string.  
Output consists of a string.  
Refer sample output for formatting specifications.  
Sample Input 1:  
0
8
5-12-1987  
-11-2010  
Sample Output 1:  
2/05/1987  
1
MAIN:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.*;  
public class Main {  
public static void main(String[] args) throws ParseException {  
Scanner s = new Scanner(System.in);  
String s1=s.next();  
String s2=s.next();  
System.out.println(UserMainCode.findOldDate(s1,s2));  
}
}
USERMAINCODE:  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.Calendar;  
import java.util.Date;  
public class UserMainCode {  
public static String findOldDate(String s1,String s2) throws ParseException  
{
SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");  
SimpleDateFormat sdf1=new SimpleDateFormat("MM-dd-yyyy");  
Date d1=sdf.parse(s1);  
Date d2=sdf.parse(s2);  
Calendar cal=Calendar.getInstance();  
cal.setTime(d1);  
long y=cal.getTimeInMillis();  
cal.setTime(d2);  
long y1=cal.getTimeInMillis();  
String s3=sdf1.format(d1);  
String s4=sdf1.format(d2);  
if(y<y1)  
return s3;  
else  
return s4;  
}
}
4
2.Interest Calculation  
Write a program to calculate amount of the acccount holders based on the below mentioned prototype:  
. Read account details from the User. The details would include id, DOB (date of birth) and amount in the given order. The  
datatype for id is string, DOB is string and amount is integer.  
. You decide to build two hashmaps. The first hashmap contains employee id as key and DOB as value, and the second  
hashmap contains same employee ids as key and amount as value.  
. Rate of interest as on 01/01/2015:  
1
2
3
a. If the age greater than or equal to 60 then interest rate is 10% of Amount.  
b.If the age less then to 60 and greater than or equal to 30 then interest rate is 7% of Amount.  
v. If the age less then to 30 interest rate is 4% of Amount.  
4
5
. Revised Amount= principle Amount + interest rate.  
. You decide to write a function calculateInterestRate which takes the above hashmaps as input and returns the treemap  
as output. Include this function in class UserMainCode.  
Create a Class Main which would be used to read employee details in step 1 and build the two hashmaps. Call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of account details. The first number indicates the size of the acoount. The next three values indicate the user  
id, DOB and amount. The Employee DOB format is “dd-mm-yyyy”  
Output consists of the user id and the amount for each user one in a line.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
SBI-1010  
2
1
0-01-1987  
0000  
SBI-1011  
0
1
3-08-1980  
5000  
SBI-1012  
0
2
5-11-1975  
0000  
SBI-1013  
0
3
2-12-1950  
0000  
Sample Output 1:  
SBI-1010:10400  
SBI-1011:16050  
SBI-1012:21400  
SBI-1013:33000  
MAIN  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.Scanner;  
import java.util.TreeMap;  
public class Main {  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
int s=Integer.parseInt(sc.nextLine());  
HashMap<String,String>hm=new HashMap<String,String>();  
HashMap<String,Integer>hm1=new HashMap<String,Integer>();  
for(int i=0;i<s;i++)  
{
String id=sc.nextLine();  
hm.put(id, sc.nextLine());  
hm1.put(id,Integer.parseInt(sc.nextLine()));  
}
TreeMap<String,Integer>tm=new TreeMap<String,Integer>();  
tm=UserMainCode.calculateInterestRate(hm,hm1);  
Iterator<String> it=tm.keySet().iterator();  
while(it.hasNext())  
{
String n=it.next();  
int fac=tm.get(n);  
System.out.println(n+":"+fac);  
}
}
}
USERMAINCODE  
import java.text.DecimalFormat;  
import java.text.SimpleDateFormat;  
import java.util.Date;  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.HashMap;  
import java.util.TreeMap;  
public class UserMainCode  
{
public static TreeMap<String,Integer> calculateInterestRate  
(
HashMap<String,String>hm,HashMap<String,Integer>hm1)  
{
int year=0,amount=0;  
double dis=0;  
String now="01/01/2015";  
TreeMap<String,Integer>tm=new TreeMap<String,Integer>();  
Iterator<String> it=hm.keySet().iterator();  
while(it.hasNext())  
{
String id=it.next();  
String dor=hm.get(id);  
amount=hm1.get(id);  
SimpleDateFormat sdf=new SimpleDateFormat("dd-MM-yyyy");  
SimpleDateFormat sdf1=new SimpleDateFormat("dd/MM/yyyy");  
try  
{
Date d=sdf.parse(dor);  
Date d1=sdf1.parse(now);  
sdf.setLenient(false);  
int y=d.getYear();  
int y1=d1.getYear();  
int m=d.getMonth();  
int m1=d1.getMonth();  
int day=d.getDay();  
int day1=d1.getDay();  
year=y1-y;  
if(m>m1)  
year--;  
else if(m==m1)  
{
if(day<day1)  
year--;  
}
if(year>=60)  
dis=0.1*amount+amount;  
else if(year<60 && year>=30 )  
dis=0.07*amount+amount;  
else  
dis=0.04*amount+amount;  
tm.put(id,(int)dis);  
}
catch(Exception e)  
{
e.printStackTrace();  
}
}
return tm;  
}
}
4
3.Discount Rate Calculation  
Write a program to calculate discount of the acccount holders based on the transaction amount and registration date using  
below mentioned prototype:  
1
. Read account details from the User. The details would include id, DOR (date of registration) and transaction amount in the  
given order. The datatype for id is string, DOR is string and transaction amount is integer.  
. You decide to build two hashmaps. The first hashmap contains employee id as key and DOR as value, and the second  
hashmap contains same employee ids as key and amount as value.  
. Discount Amount as on 01/01/2015:  
2
3
a. If the transaction amount greater than or equal to 20000 and registration greater than or equal to 5 year then discount  
rate is 20% of transaction amount.  
b. If the transaction amount greater than or equal to 20000 and registration less then to 5 year then discount rate is 10%  
of transaction amount.  
c. If the transaction amount less than to 20000 and registration greater than or equal to 5 year then discount rate is 15%  
of transaction amount.  
d. If the transaction amount less than to 20000 and registration less then to 5 year then discount rate is 5% of transaction  
amount.  
4
. You decide to write a function calculateDiscount which takes the above hashmaps as input and returns the treemap as  
output. Include this function in class UserMainCode.  
Create a Class Main which would be used to read employee details in step 1 and build the two hashmaps. Call the static  
method present in UserMainCode.  
Input and Output Format:  
Input consists of transaction details. The first number indicates the size of the employees. The next three values indicate the  
user id, user DOR and transaction amount. The DOR (Date of Registration) format is “dd-mm-yyyy”  
Output consists of a string which has the user id and discount amount one in a line for each user.  
Refer sample output for formatting specifications.  
Sample Input 1:  
4
A-1010  
2
2
0-11-2007  
5000  
B-1011  
0
3
4-12-2010  
0000  
C-1012  
1
1
1-11-2005  
5000  
D-1013  
0
1
2-12-2012  
0000  
Sample Output 1:  
A-1010:5000  
B-1011:3000  
C-1012:2250  
D-1013:500  
MAIN:  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.TreeMap;  
import java.util.Scanner;  
public class Main{  
public static void main(String []args){  
Scanner sc=new Scanner(System.in);  
int s=Integer.parseInt(sc.nextLine());  
HashMap<String,String>hm=new HashMap<String,String>();  
HashMap<String,Integer>hm1=new HashMap<String,Integer>();  
for(int i=0;i<s;i++)  
{
String id=sc.nextLine();  
hm.put(id, sc.nextLine());  
hm1.put(id,Integer.parseInt(sc.nextLine()));  
}
TreeMap<String,Integer>tm=new TreeMap<String,Integer>();  
tm=UserMainCode.calculateDiscount(hm,hm1);  
Iterator<String> it=tm.keySet().iterator();  
while(it.hasNext())  
{
String n=it.next();  
int fac=tm.get(n);  
System.out.println(n+":"+fac);  
}
}
}
USERMAINCODE  
import java.text.SimpleDateFormat;  
import java.util.Date;  
import java.util.HashMap;  
import java.util.*;  
public class UserMainCode  
{
public static TreeMap<String,Integer> calculateDiscount  
(
HashMap<String,String>hm,HashMap<String,Integer>hm1)  
{
int amount=0;  
double dis=0;  
String now="01/01/2015";  
TreeMap<String,Integer>tm=new TreeMap<String,Integer>();  
Iterator<String> it=hm.keySet().iterator();  
while(it.hasNext())  
{
String id=it.next();  
String dor=hm.get(id);  
amount=hm1.get(id);  
SimpleDateFormat sdf=new SimpleDateFormat("dd-MM-yyyy");  
sdf.setLenient(false);  
try{  
Date d=new Date();  
Date d1=new Date();  
String a=dor;  
String b="01-01-2014";  
d=sdf.parse(a);  
d1=sdf.parse(b);  
long t=d.getTime();  
long t1=d1.getTime();  
long t3=t1-t;  
long l1=(24 * 60 * 60 * 1000);  
long l=l1*365;  
long year1=t3/l;  
/System.out.println("Result="+year1);  
/
if(year1>=5 && amount>=20000)  
dis=0.2*amount;  
else if(year1<5 && amount>=20000)  
dis=0.1*amount;  
else if(year1>=5 && amount<20000)  
dis=0.15*amount;  
else  
dis=0.05*amount;  
tm.put(id,(int)dis);  
}
catch(Exception e)  
{
e.printStackTrace();  
}
}
return tm;  
}
}